Add lightbulb overlay for app and core.

* Needed by device with flash, default flash availability is false.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Conflicts:
	full_mako.mk

Change-Id: I42320e2773061f3e5bc3b49f0735f1c20e706370

Conflicts:
	full_hammerhead.mk