safe_asterisk: Cleanup additions to r415132.

Replaced a stray echo that should've been a message call in
safe_asterisk. I'm using the contents of the old message inside the
if $NOTIFY so peoples log parsing scripts won't get confused by new
messages. I'll clean that up in trunk.

(Note that a 'make install' still won't overwrite your old safe_asterisk
if it exists. See ASTERISK-21965.)

ASTERISK-23492 #close


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/1.8@415521 f38db490-d61c-443f-a65b-d21fe96a405b