Add syntax files from upstream vim repository

compiler/javac.vim

@@ -0,0 +1,21 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim compiler file
+" Compiler:	javac
+" Maintainer:	Doug Kearns <dougkearns@gmail.com>
+" Last Change:	2004 Nov 27
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "javac"
+
+if exists(":CompilerSet") != 2		" older Vim always used :setlocal
+  command -nargs=* CompilerSet setlocal <args>
+endif
+
+CompilerSet makeprg=javac
+
+CompilerSet errorformat=%E%f:%l:\ %m,%-Z%p^,%-C%.%#,%-G%.%#
+
+endif