Add syntax files from upstream vim repository

ftplugin/abap.vim

@@ -0,0 +1,33 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim filetype plugin file
+" Language:	ABAP
+" Author:	Steven Oliver <oliver.steven@gmail.com>
+" Copyright:	Copyright (c) 2013 Steven Oliver
+" License:	You may redistribute this under the same terms as Vim itself
+" --------------------------------------------------------------------------
+
+" Only do this when not done yet for this buffer
+if (exists("b:did_ftplugin"))
+  finish
+endif
+let b:did_ftplugin = 1
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+setlocal softtabstop=2 shiftwidth=2
+setlocal suffixesadd=.abap
+
+" Windows allows you to filter the open file dialog
+if has("gui_win32") && !exists("b:browsefilter")
+  let b:browsefilter = "ABAP Source Files (*.abap)\t*.abap\n" .
+                     \ "All Files (*.*)\t*.*\n"
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: set sw=4 sts=4 et tw=80 :
+
+endif