optimize pcre and fix autoheadache

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@387 d0543943-73ff-0310-b7d9-9358b9ac24b2

checkversion.sh

@@ -12,6 +12,7 @@ oldversion=`cat .version 2>/dev/null || echo "0"`
 if [ $oldversion != $version ] ; then
     cat src/include/switch_version.h.in | sed "s/@SVN_VERSION@/$version/g" > src/include/switch_version.h
     echo $version > .version
+    make modclean
 fi