Update qbs submodule to version 1.0.1.

Change-Id: Ic5f6968736c6d465700baf2afeb388efc90ac1ab
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Remove workaround for qbs bug.

It's been fixed.

Change-Id: I49f3dc193752c2796548b5f49eb4e66824125b71
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>