Add syntax files from upstream vim repository

syntax/icemenu.vim

@@ -0,0 +1,38 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim syntax file
+" Language:	Icewm Menu
+" Maintainer:	James Mahler <James.Mahler@gmail.com>
+" Last Change:	Fri Apr  1 15:13:48 EST 2005
+" Extensions:	~/.icewm/menu
+" Comment:	Icewm is a lightweight window manager.  This adds syntax
+"		highlighting when editing your user's menu file (~/.icewm/menu).
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+	finish
+endif
+
+" not case sensitive
+syntax case ignore
+
+" icons .xpm .png and .gif
+syntax match _icon /"\=\/.*\.xpm"\=/
+syntax match _icon /"\=\/.*\.png"\=/
+syntax match _icon /"\=\/.*\.gif"\=/
+syntax match _icon /"\-"/
+
+" separator
+syntax keyword _rules separator
+
+" prog and menu
+syntax keyword _ids menu prog
+
+" highlights
+highlight link _rules Underlined
+highlight link _ids Type
+highlight link _icon Special
+
+let b:current_syntax = "IceMenu"
+
+endif