Add syntax files from upstream vim repository

syntax/godoc.vim

@@ -0,0 +1,23 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim syntax file
+" Language:	Godoc (generated documentation for go)
+" Maintainer:	David Barnett (https://github.com/google/vim-ft-go)
+" Last Change:	2014 Aug 16
+
+if exists('b:current_syntax')
+  finish
+endif
+
+syn case match
+syn match godocTitle "^\([A-Z][A-Z ]*\)$"
+
+
+hi def link godocTitle Title
+
+
+let b:current_syntax = 'godoc'
+
+" vim: sw=2 sts=2 et
+
+endif