Add sample events for aastra phones.

aastra-check-cfg is the same as the other check-cfg entries,
 and aastra-xml is to load a pre-configured xml script.

(closes issue #12229)
Reported by: gowen72
Patches:
      aastra.patch uploaded by gowen72 (license 432)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@109111 65c4cc65-6c06-0410-ace0-fbb531ad65f3