Add support for language Awadhi (awa)

Per request at
https://translatewiki.net/wiki/Thread:Support/Awadhi_Language_%28%E0%A4%85%E0%A4%B5%E0%A4%A7%E0%A5%80_%E0%A4%AD%E0%A4%BE%E0%A4%B7%E0%A4%BE_%29

Change-Id: I891b9619fa5961b7cf65a031d8b603397a627b63