Bug 6638 - Change from a historic BSD command to a POSIX command for determining username

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@11634 65c4cc65-6c06-0410-ace0-fbb531ad65f3

build_tools/make_build_h

@@ -3,7 +3,7 @@ HOSTNAME=`uname -n`
 KERNEL=`uname -r`
 MACHINE=`uname -m`
 OS=`uname -s`
-USER=`whoami`
+USER=`id -un`
 DATE=`date -u "+%Y-%m-%d %H:%M:%S"`
 cat << END
 /*