Prune all dead branches, not only those from the 'origin'.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

switch_all_submodules_to_head_and_clean

@@ -72,7 +72,9 @@ updateModule() {
         git reset --hard HEAD
         git clean -dxff
     fi
-    git remote prune origin
+    for _remote in `git remote`; do
+		    git remote prune $_remote
+		done
 
     if [[ -e $PARENTDIR/$MODULE.gitmodules ]]; then
         if [[ $gituser == "anonymous" ]]; then