[FIX] res.lang: ar_AR does not exist (Arabic in Argentina?!) -> replaced with ar_SY

ar_SY is the default locale alias for the `ar`
code in babel, so we can use that until a
translation team asks for a regional
variation of Arabic.

This should also fix an issue in the web
client, where ar_AR was not working, because
silently replaced with ar_SY.

This will only work for new databases,
old ones should be manually fixed.

bzr revid: odo@openerp.com-20121024161527-vec2r46a4o5lk47x

openerp/tools/misc.py

@@ -597,7 +597,7 @@ def get_iso_codes(lang):
 
 ALL_LANGUAGES = {
         'ab_RU': u'Abkhazian / аҧсуа',
-        'ar_AR': u'Arabic / الْعَرَبيّة',
+        'ar_SY': u'Arabic / الْعَرَبيّة',
         'bg_BG': u'Bulgarian / български език',
         'bs_BS': u'Bosnian / bosanski jezik',
         'ca_ES': u'Catalan / Català',