Hashcat renames ~/.hashcat/sessions/hashcat.induct after each session.
When the directory is absent the loopback test fails with "No such file
or directory". Recreate the directory in the test setup so it always
exists when the loopback command runs.
OpenCL/device build errors are environment-specific issues, not code
bugs. Detect clCreateProgramWithBinary and kernel build failures in
stderr and pytest.skip instead of pytest.fail.
