Fix clone to setup the origin if its name ends with .git

The problem is visible when cloning a local repo. The cloned
repository will have the origin url setup incorrectly: the origin name
will be copied verbatim in origin url of the cloned repository.
Normally, the name is to be expanded into absolute path.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-clone.sh

@@ -20,7 +20,7 @@ usage() {
 get_repo_base() {
 	(
 		cd "`/bin/pwd`" &&
-		cd "$1" &&
+		cd "$1" || cd "$1.git" &&
 		{
 			cd .git
 			pwd