minijail: Convert to common.mk.

BUG=chromium:403963
TEST=cros_workon_make --board=expresso chromeos-minijail --test passes.
TEST=cros_workon_make --board=x86-alex chromeos-minijail --test passes.
TEST=security_Minijail0 on daisy_spring passes.
TEST=security_Minijail_seccomp on daisy_spring passes.

Change-Id: I7dc0ca38e8499cb6620ab5ffe32cf204a2f9c35d
Reviewed-on: https://chromium-review.googlesource.com/214055
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Jorge Lucangeli Obes <jorgelo@chromium.org>
3 files changed