disable doxygen

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@11639 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sofia-sip/configure.gnu

 #! /bin/sh
-./configure "$@" --with-pic --with-glib=no --disable-shared
+./configure "$@" --with-pic --with-glib=no --disable-shared --without-doxygen