package/Config.in: fix alphabetic order

Commit ebf3a6117c58 (package/libyuv: new package, 2015-08-11) added a
reference to the libyuv Config.in file at the wrong place. Fix that.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/Config.in

@@ -962,8 +962,8 @@ menu "Multimedia"
 	source "package/libopenh264/Config.in"
 	source "package/libplayer/Config.in"
 	source "package/libtheora/Config.in"
-	source "package/live555/Config.in"
 	source "package/libyuv/Config.in"
+	source "package/live555/Config.in"
 	source "package/mediastreamer/Config.in"
 	source "package/x264/Config.in"
 endmenu