scripts/run-tests.sh: Add support to kmemleak and igt_facts

Updates scripts/run-tests.sh to include the following options:

 -f:        enable igt_facts on igt_runner
 -K <mode>: Linux Kernel kmemleak reports
            - once: run a kmemleak scan after all tests
            - each: run a kmemleak scan after each test

These options are simply relayed to igt_runner.

Cc: vitaly.prosyak@amd.com
Cc: christian.koenig@amd.com
Cc: alexander.deucher@amd.com
Cc: jesse.zhang@amd.com
Cc: harry.wentland@amd.com
Cc: zbigniew.kempczynski@intel.com
Cc: kamil.konieczny@linux.intel.com
Cc: ryszard.knop@intel.com
Cc: lucas.demarchi@intel.com
Cc: katarzyna.piecielska@intel.com
Reviewed-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-by: Peter Senna Tschudin <peter.senna@linux.intel.com>