contribs: updated binary package for Darwin including latest libmodplug

(cherry picked from commit 291ea8c1)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

extras/contrib/Makefile

@@ -47,7 +47,7 @@ src: using-src
 
 ifdef HAVE_DARWIN_OS
 
-CONTRIBREV=28
+CONTRIBREV=29
 
 contrib-macosx-$(ARCH)-$(CONTRIBREV).tar.bz2:
 	$(WGET) http://downloads.videolan.org/pub/videolan/testing/contrib/$@