ART: Add ART_TEST_DONT_REBOOT_DEVICE flag.

Adds a flag to prevent the device from rebooting
during buildbot-setup-device.sh. This is useful when
running on Arm FVP - 'adb reboot' doesn't restart it
properly.

Test: test-art-target.
Change-Id: I9ff85c974da8248d35af0c9360fd38ace3c27f7e
1 file changed