Move STD_MOD declaration to end of file as per the norm of everything else...

Move STD_MOD declaration to end of file as per the norm of everything else (issue #7711 reported by Mithraen)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@39514 65c4cc65-6c06-0410-ace0-fbb531ad65f3