Add syntax files from upstream vim repository

compiler/msbuild.vim

@@ -0,0 +1,25 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim compiler file
+" Compiler:	Microsoft Visual Studio C#
+" Maintainer:	Chiel ten Brinke (ctje92@gmail.com)
+" Last Change:	2013 May 13
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "msbuild"
+let s:keepcpo= &cpo
+set cpo&vim
+
+if exists(":CompilerSet") != 2		" older Vim always used :setlocal
+  command -nargs=* CompilerSet setlocal <args>
+endif
+
+CompilerSet errorformat=\ %#%f(%l\\\,%c):\ %m
+CompilerSet makeprg=msbuild\ /nologo\ /v:q\ /property:GenerateFullPaths=true
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+endif