Acceptance tests: bump pycdlib version for easier installation

Acceptance tests: bump pycdlib version for easier installation

On with certain versions of "pip", package installations will attempt
to create wheels.  And, on environments without a "complete" Python
installation (as described in the acceptance tests requirements docs),
that will fail.

pycdlib, starting with version 1.11.0, is now being made available
as wheels, so its instalation on those constrained environments is
now possible.

Buglink: https://bugs.launchpad.net/qemu/+bug/1897783
Reported-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Cleber Rosa <[email protected]>
Message-Id: <20201009205513[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Tested-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>