Turn on USE=lockvt for daisy

USE=lockvt tells the power manager to lock VT's on suspend/resume and
not use a suspend console.  This should speed up the UI becoming
visible on resume and workaround an issue with the wrong VT being
displayed on resume.

BUG=chrome-os-partner:12471
TEST=Rapid suspend/resumes via lid switch, could not reproduce
  the case where screen is blank on resume.
  Observed VT lock log messages in powerm.LATEST

Change-Id: Ic2a0b5a5727f7c2e62f2be4cdba358f6bb4a6ef7
Reviewed-on: https://gerrit.chromium.org/gerrit/29826
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Jon Kliegman <kliegs@chromium.org>
Commit-Ready: Jon Kliegman <kliegs@chromium.org>
(cherry picked from commit 59aeb791fd5ee96fd8bd201629f41f24e3185563)
Reviewed-on: https://gerrit.chromium.org/gerrit/33002
Reviewed-by: Katie Roberts-Hoffman <katierh@chromium.org>
Tested-by: Katie Roberts-Hoffman <katierh@chromium.org>
diff --git a/overlay-daisy/make.conf b/overlay-daisy/make.conf
index 2dd6dfe..97c9a36 100644
--- a/overlay-daisy/make.conf
+++ b/overlay-daisy/make.conf
@@ -14,7 +14,7 @@
 INPUT_DEVICES="${INPUT_DEVICES} cmt"
 
 USE="${USE} als cmt exynos neon new_power_button -opengl opengles aura"
-USE="${USE} serial_use_ttySAC3 device_tree hardfp"
+USE="${USE} serial_use_ttySAC3 device_tree hardfp lockvt"
 # Set default build to snow, USE="-snow" to build daisy.
 USE="${USE} snow"
 VIDEO_CARDS="${VIDEO_CARDS} armsoc"