switch from chromeos-base/chromeos-test to virtual/target-os-test

This is mechanical -- virtual/target-os-test depends on chromeos-test,
so there shouldn't be any real difference in the build.

BUG=chromium:329920
TEST=`cbuildbot {arm,amd64,x86}-generic-full` pass
CQ-DEPEND=CL:198230
CQ-DEPEND=CL:198157

Change-Id: I7072de0c988696e059bf02831d3e83543c0ecbf6
Reviewed-on: https://chromium-review.googlesource.com/198231
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
2 files changed