Also add an XXX comment that I'm baffled nobody has ever complained about.  We
say "first message", and then we go into language-specific stuff where we
proceed to say..."first message".

(closes issue #15053)
Reported by: dinhtrung
Patches:
      vietnamese.ods uploaded by dinhtrung (license 776)
      app_voicemail.c.diff uploaded by dinhtrung (license 776)

(closes issue #15626)
Reported by: dinhtrung
Patches:
      say.c.diff uploaded by dinhtrung (license 776)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@237050 65c4cc65-6c06-0410-ace0-fbb531ad65f3