Cr50: Don't build native tests for this target

The ancient native tests can't deal with board-specific
configurations, don't build them. We run generic changes with
host tests and board-specific cases by running on real hardware.

BUG=chrome-os-partner:55705
BRANCH=none
TEST=make BOARD=cr50 tests; make buildall; test on Cr50 hardware

Change-Id: I5eb7229ca9df16293d6f0f84b474d4c992277baf
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/363942
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
1 file changed