Fix ART testing scripts to support checker tests on VM.

Bug: 271573990

Test: run ART test 004-checker-UnsafeTest18 on a Linux ARM64 VM:
  lunch aosp_arm64-userdebug

  export ART_TEST_SSH_USER=ubuntu
  export ART_TEST_SSH_HOST=localhost
  export ART_TEST_SSH_PORT=10001
  export ART_TEST_ON_VM=true

  . art/tools/buildbot-utils.sh
  art/tools/buildbot-build.sh --target

  # Create, boot and configure the VM.
  art/tools/buildbot-vm.sh create
  art/tools/buildbot-vm.sh boot
  art/tools/buildbot-vm.sh setup-ssh  # password: 'ubuntu'

  art/tools/buildbot-cleanup-device.sh
  art/tools/buildbot-setup-device.sh
  art/tools/buildbot-sync.sh

  art/test.py --target -r --ndebug --64 --optimizing \
      004-checker-UnsafeTest18

Change-Id: I0fa317c834db677045854008101d45dac36fd694
2 files changed