Recent versions of autoconf (2.68 on my system) won't properly process the configure
script unless every call to AC_LANG_PROGRAM is m4-quoted. Many calls in the script
were, but many were not. This patch corrects the unquoted calls.
git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@350837 65c4cc65-6c06-0410-ace0-fbb531ad65f3