Documentation: Update git repository URL for Smack userland tools

The userland git repository has been moved to a new place.
Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Cc: Rob Landley <rob@landley.net>
Cc: linux-security-module@vger.kernel.org
Cc: lkml@vger.kernel.org

Documentation/security/Smack.txt

@@ -28,12 +28,11 @@ Smack kernels use the CIPSO IP option. Some network
 configurations are intolerant of IP options and can impede
 access to systems that use them as Smack does.
 
-The current git repositories for Smack user space are:
+The current git repository for Smack user space is:
 
-	git@gitorious.org:meego-platform-security/smackutil.git
-	git@gitorious.org:meego-platform-security/libsmack.git
+	git://github.com/smack-team/smack.git
 
-These should make and install on most modern distributions.
+This should make and install on most modern distributions.
 There are three commands included in smackutil:
 
 smackload  - properly formats data for writing to /smack/load