Add localization support for Spanish

(closes issue #17548)
Reported by: cjacobsen
Patches:
      say.conf.sample.diff uploaded by cjacobsen (license 1029)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@272243 65c4cc65-6c06-0410-ace0-fbb531ad65f3