Fix applying of ffmpeg-svn-configure patch.

extras/contrib/src/Makefile

@@ -1090,7 +1090,7 @@ ifdef HAVE_UCLIBC
 	patch -p0 < Patches/ffmpeg-svn-internal-define.patch
 	patch -p0 < Patches/ffmpeg-svn-libavformat.patch
 endif
-	(cd $@; patch -p0 < Patches/ffmpeg-svn-configure.patch )
+	(cd $@; patch -p0 < ../Patches/ffmpeg-svn-configure.patch )
 else
 ffmpeg-$(FFMPEG_VERSION).tar.gz:
 	echo "ffmpeg snapshot is too old, you MUST use subversion !"