Move lengthy tests from 'make runtests' to 'make runlongtests'

This reduces 'make runtests' from ~90 sec on a z620 to ~8 sec, which
is short enough we can run it as part of the continuous build.

BUG=chromium-os:26317
BRANCH=none
TEST=make && time make runtests && time make runlongtests

Change-Id: I8165efaf8b8290ca3c8f8da73e3f8a54c2bc19f9
Reviewed-on: https://gerrit.chromium.org/gerrit/40374
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Queue: Randall Spangler <rspangler@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>
5 files changed