Require --enable-nonfree for turning on libfaac support.

libfaac lies about being LGPL, when it really is not.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@18715 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

configure

@@ -1748,6 +1748,7 @@ die_license_disabled gpl x11grab
 
 die_license_disabled nonfree libamr_nb
 die_license_disabled nonfree libamr_wb
+die_license_disabled nonfree libfaac
 
 
 check_deps $ARCH_EXT_LIST