Upstream modifications in K3.12 to the sw_sync driver set O_CLOEXEC on
the fd's returned by the SW_SYNC_IOC_CREATE_FENCE ioctl, therefore we
check the return of fcntl() for a non-negative value instead of strictly 0.
Change-Id: If4c82750fcc0aa3a57f243fa2a94691e3150e4a4
Not complete yet, but substantially more comprehensive than the
interactive test that was there before.
(cherry-picked from internal master, same change-id).
Change-Id: I9019b0a8babbc91f78aa850e0e288bbf05f93500
Tom Cherry