Add copy_python_gdb for 3.7.3 and move patches.

Fixes issue introduced in #1283 and #1308.

plugins/python-build/share/python-build/patches/3.1.0/Python-3.1/000_patch-setup.py.diff

@@ -0,0 +1,45 @@
+diff -r -u ../Python-3.1/setup.py ./setup.py
+--- ../Python-3.1/setup.py	2009-05-24 02:13:14.000000000 +0900
++++ ./setup.py	2015-08-15 13:29:18.300777605 +0900
+@@ -14,6 +14,7 @@
+ from distutils.command.build_ext import build_ext
+ from distutils.command.install import install
+ from distutils.command.install_lib import install_lib
++from distutils.spawn import find_executable
+ 
+ # This global variable is used to hold the list of modules to be disabled.
+ disabled_module_list = []
+@@ -293,10 +294,33 @@
+                 return platform
+         return sys.platform
+ 
++    def add_multiarch_paths(self):
++        # Debian/Ubuntu multiarch support.
++        # https://wiki.ubuntu.com/MultiarchSpec
++        if not find_executable('dpkg-architecture'):
++            return
++        tmpfile = os.path.join(self.build_temp, 'multiarch')
++        if not os.path.exists(self.build_temp):
++            os.makedirs(self.build_temp)
++        ret = os.system(
++            'dpkg-architecture -qDEB_HOST_MULTIARCH > %s 2> /dev/null' %
++            tmpfile)
++        try:
++            if ret >> 8 == 0:
++                with open(tmpfile) as fp:
++                    multiarch_path_component = fp.readline().strip()
++                add_dir_to_list(self.compiler.library_dirs,
++                                '/usr/lib/' + multiarch_path_component)
++                add_dir_to_list(self.compiler.include_dirs,
++                                '/usr/include/' + multiarch_path_component)
++        finally:
++            os.unlink(tmpfile)
++
+     def detect_modules(self):
+         # Ensure that /usr/local is always used
+         add_dir_to_list(self.compiler.library_dirs, '/usr/local/lib')
+         add_dir_to_list(self.compiler.include_dirs, '/usr/local/include')
++        self.add_multiarch_paths()
+ 
+         # Add paths specified in the environment variables LDFLAGS and
+         # CPPFLAGS for header and library files.

plugins/python-build/share/python-build/patches/3.1.0/Python-3.1/010_ssl_no_ssl2_no_ssl3.patch

@@ -0,0 +1,96 @@
+diff -r -u ../Python-3.1.2.orig/Lib/ssl.py ./Lib/ssl.py
+--- ../Python-3.1.2.orig/Lib/ssl.py	2010-01-18 09:16:17.000000000 +0000
++++ ./Lib/ssl.py	2015-12-20 07:36:08.545346519 +0000
+@@ -60,20 +60,23 @@
+ 
+ from _ssl import SSLError
+ from _ssl import CERT_NONE, CERT_OPTIONAL, CERT_REQUIRED
+-from _ssl import (PROTOCOL_SSLv2, PROTOCOL_SSLv3, PROTOCOL_SSLv23,
+-                  PROTOCOL_TLSv1)
+-from _ssl import RAND_status, RAND_egd, RAND_add
+-from _ssl import (
+-    SSL_ERROR_ZERO_RETURN,
+-    SSL_ERROR_WANT_READ,
+-    SSL_ERROR_WANT_WRITE,
+-    SSL_ERROR_WANT_X509_LOOKUP,
+-    SSL_ERROR_SYSCALL,
+-    SSL_ERROR_SSL,
+-    SSL_ERROR_WANT_CONNECT,
+-    SSL_ERROR_EOF,
+-    SSL_ERROR_INVALID_ERROR_CODE,
+-    )
++from _ssl import RAND_status, RAND_add
++try:
++    from _ssl import RAND_egd
++except ImportError:
++    # LibreSSL does not provide RAND_egd
++    pass
++
++def _import_symbols(prefix):
++    for n in dir(_ssl):
++        if n.startswith(prefix):
++            globals()[n] = getattr(_ssl, n)
++
++_import_symbols('OP_')
++_import_symbols('SSL_ERROR_')
++_import_symbols('PROTOCOL_')
++
++_PROTOCOL_NAMES = {value: name for name, value in globals().items() if name.startswith('PROTOCOL_')}
+ 
+ from socket import getnameinfo as _getnameinfo
+ from socket import error as socket_error
+@@ -415,7 +418,7 @@
+     d = pem_cert_string.strip()[len(PEM_HEADER):-len(PEM_FOOTER)]
+     return base64.decodebytes(d.encode('ASCII', 'strict'))
+ 
+-def get_server_certificate(addr, ssl_version=PROTOCOL_SSLv3, ca_certs=None):
++def get_server_certificate(addr, ssl_version=PROTOCOL_SSLv23, ca_certs=None):
+     """Retrieve the certificate from the server at the specified address,
+     and return it as a PEM-encoded string.
+     If 'ca_certs' is specified, validate the server cert against it.
+diff -r -u ../Python-3.1.2.orig/Modules/_ssl.c ./Modules/_ssl.c
+--- ../Python-3.1.2.orig/Modules/_ssl.c	2010-03-02 22:49:30.000000000 +0000
++++ ./Modules/_ssl.c	2015-12-20 07:35:02.675100987 +0000
+@@ -62,8 +62,12 @@
+ };
+ 
+ enum py_ssl_version {
++#ifndef OPENSSL_NO_SSL2
+ 	PY_SSL_VERSION_SSL2,
++#endif
++#ifndef OPENSSL_NO_SSL3
+ 	PY_SSL_VERSION_SSL3,
++#endif
+ 	PY_SSL_VERSION_SSL23,
+ 	PY_SSL_VERSION_TLS1,
+ };
+@@ -299,10 +303,14 @@
+ 	PySSL_BEGIN_ALLOW_THREADS
+ 	if (proto_version == PY_SSL_VERSION_TLS1)
+ 		self->ctx = SSL_CTX_new(TLSv1_method()); /* Set up context */
++#ifndef OPENSSL_NO_SSL3
+ 	else if (proto_version == PY_SSL_VERSION_SSL3)
+ 		self->ctx = SSL_CTX_new(SSLv3_method()); /* Set up context */
++#endif
++#ifndef OPENSSL_NO_SSL2
+ 	else if (proto_version == PY_SSL_VERSION_SSL2)
+ 		self->ctx = SSL_CTX_new(SSLv2_method()); /* Set up context */
++#endif
+ 	else if (proto_version == PY_SSL_VERSION_SSL23)
+ 		self->ctx = SSL_CTX_new(SSLv23_method()); /* Set up context */
+ 	PySSL_END_ALLOW_THREADS
+@@ -1698,10 +1706,14 @@
+ 				PY_SSL_CERT_REQUIRED);
+ 
+ 	/* protocol versions */
++#ifndef OPENSSL_NO_SSL2
+ 	PyModule_AddIntConstant(m, "PROTOCOL_SSLv2",
+ 				PY_SSL_VERSION_SSL2);
++#endif
++#ifndef OPENSSL_NO_SSL3
+ 	PyModule_AddIntConstant(m, "PROTOCOL_SSLv3",
+ 				PY_SSL_VERSION_SSL3);
++#endif
+ 	PyModule_AddIntConstant(m, "PROTOCOL_SSLv23",
+ 				PY_SSL_VERSION_SSL23);
+ 	PyModule_AddIntConstant(m, "PROTOCOL_TLSv1",