switch_all_submodules_to_head_and_clean: Add support to clone from mirror

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

switch_all_submodules_to_head_and_clean

@@ -56,6 +56,14 @@ if [[ -e .gitmodules ]]; then
 	else
 		sed -i "s/system@/$gituser@/g" .gitmodules
 	fi
+	REPO_URL=$(git config --get remote.origin.url |\
+	           sed "s|\(https\?\)://\([^@]*@\)\?\(.*\)/[^/]*$|\3|")
+	REPO_PROTO=$(git config --get remote.origin.url |\
+	             sed "s|\(https\?\)://\([^@]*@\)\?\(.*\)/[^/]*$|\1|")
+	REPO_MASTER=scm.trinitydesktop.org/scm/git
+	if [[ "$REPO_URL" != "$REPO_MASTER" ]]; then
+		sed -i "s#https\?://\([^@]*@\)\?$REPO_MASTER#$REPO_PROTO://\1$REPO_URL#g" .gitmodules
+	fi
 
 	git submodule init
 	git submodule update