switch from hard-host-depends to virtual/target-sdk

This is mechanical -- virtual/target-sdk depends on hard-host-depends,
so there shouldn't be any real difference in the build.

BUG=chromium:329920
TEST=`cbuildbot chromiumos-sdk`
CQ-DEPEND=CL:191014

Change-Id: I981a81ac9b5dacf4328efa912545b402b72ae4bb
Reviewed-on: https://chromium-review.googlesource.com/191143
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
3 files changed