Add and fix tests from upstream vim

ftplugin/make.vim

@@ -0,0 +1,37 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'make') == -1
+
+" Vim filetype plugin file
+" Language:	Make
+" Maintainer:	Bram Moolenaar <Bram@vim.org>
+" Last Change:	2019 Apr 02
+
+" Only do this when not done yet for this buffer
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setl et< sts< fo< com< cms< inc<"
+
+" Make sure a hard tab is used, required for most make programs
+setlocal noexpandtab softtabstop=0
+
+" Set 'formatoptions' to break comment lines but not other lines,
+" and insert the comment leader when hitting <CR> or using "o".
+setlocal fo-=t fo+=croql
+
+" Set 'comments' to format dashed lists in comments
+setlocal com=sO:#\ -,mO:#\ \ ,b:#
+
+" Set 'commentstring' to put the marker after a #.
+setlocal commentstring=#\ %s
+
+" Including files.
+let &l:include = '^\s*include'
+
+" For matchit.vim, suggested by Albert Netymk and Ken Takata.
+if exists("loaded_matchit")
+  let b:match_words = '^ *ifn\=\(eq\|def\)\>:^ *else\(\s\+ifn\=\(eq\|def\)\)\=\>:^ *endif\>,\<define\>:\<endef\>,^!\s*if\(n\=def\)\=\>:^!\s*else\(if\(n\=def\)\=\)\=\>:^!\s*endif\>'
+endif
+
+endif