Submodule: Use https path

Else I got a git hickup here

.gitmodules

@@ -3,7 +3,7 @@
 	url = https://github.com/owncloud/documentation
 [submodule "src/3rdparty/qtmacgoodies"]
 	path = src/3rdparty/qtmacgoodies
-	url = git://github.com/guruz/qtmacgoodies.git
+	url = https://github.com/guruz/qtmacgoodies.git
 [submodule "binary"]
 	path = binary
 	url = git://github.com/owncloud/owncloud-client-binary.git