runner: Exit with 2 when overall timeout exceeded

That leaves exitcode 1 for aborts and initialization failures. Should
maybe differentiate those as well. Not to mention document the exit
codes.

Also fix igt_resume to follow suit to igt_runner: Generate
results.json even when aborting or exceeding overall-timeout.

Signed-off-by: Petri Latvala <petri.latvala@intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>

0 files changed, 0 insertions, 0 deletions