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.
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Merged revisions 350837 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 350838 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@350839 65c4cc65-6c06-0410-ace0-fbb531ad65f3