Add syntax files from upstream vim repository

indent/changelog.vim

@@ -0,0 +1,18 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim indent file
+" Language:	generic Changelog file
+" Maintainer:	noone
+" Last Change:	2005 Mar 29
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+   finish
+endif
+let b:did_indent = 1
+
+setlocal ai
+
+let b:undo_indent = "setl ai<"
+
+endif