VCS: Support chunks without comma

Git submodule is reported as @@ -1 +1 @@

Change-Id: Ic7a619b0f4c8eb505b75529501dcd18723de2465
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Set remote-tracking branch

Task-number: QTCREATORBUG-8863
Change-Id: I06df735d85e2f9ed17c71385fed5057f8fc67d55
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>