media-sound: Reland: cras_bench: Add ebuild file

Use google/benchmark to build a test binary to test and track
low level CRAS ops performance. This CL deploys the binary to
test images and the binary will be used by manual testing or
Tast perf tests.

Changes:
- Build cras_bench for test images with `cros_bazel`
- Add cras_bench to the dependency of `target-chromium-os-test`

Difference:
- bazel_setup_bazelrc will be called by bazel_setup_crosstool, so
  we don't need to call it again.

BUG=b:191123602
TEST=cros-workon-${BOARD} start cras_bench
      && emerge-${BOARD} cras_bench
      && cros deploy ${DUT_IP} cras_bench

Change-Id: I36f4fe5d56513d10b9c3cae2ca3b24e480dfaa00
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2979092
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Chih-Yang Hsia <paulhsia@chromium.org>
Tested-by: Chih-Yang Hsia <paulhsia@chromium.org>
5 files changed