log Asterisk Version number, Build etc into each log file

Allow tracking of previous versions through log file records to be tracked.
Each time log file is created or opened, log Asterisk Version, Buildinfo. etc.

alecdavis (license 585)
Tested by: alecdavis
 
Review: https://reviewboard.asterisk.org/r/1409/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@334619 65c4cc65-6c06-0410-ace0-fbb531ad65f3