#execing the same file multiple times led to warning messages saying that the same file was

being #included twice. This was due to the fact that #exec created a temporary file which
was then #included. The name of the temporary file was the name of the #exec'd file, with
the Unix timestamp and thread ID concatenated. The issue was that if multiple #exec statements
of the same file were reached in the same second, then the result was that the temporary files
would have duplicate names. To resolve this, the temporary file now has microsecond resolution
for the timestamp portion.

(closes issue #12574)
Reported by: jmls
Patches:
      12574.patch uploaded by putnopvut (license 60)
Tested by: jmls, putnopvut



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@115329 65c4cc65-6c06-0410-ace0-fbb531ad65f3