contrib: bghudappkit: fetch over git://

(cherry picked from commit 1b0ab501)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/bghudappkit/rules.mak

 # bghudappkit
 
-BGHUDAPPKIT_GITURL := https://github.com/binarygod/BGHUDAppKit.git
+BGHUDAPPKIT_GITURL := git://github.com/binarygod/BGHUDAppKit.git
 
 ifdef HAVE_MACOSX
 PKGS += bghudappkit