Allow override of device asserts, including multi-device support.

Set in board file with TARGET_OTA_ASSERT_DEVICE.
(cherry-picked from commit 0f452f2)

Change-Id: I3d06bdc0e3e26bde0c0e646accd050364f9713b9
add no_assets.option
Change-Id: I489e7b965aa2e4286ebacd64006522a5d206f2db
Merge tag 'android-4.3_r3' into HEAD

Android 4.3 release 3.0

Signed-off-by: Evan Anderson <evan1124@gmail.com>

Conflicts:
	core/build_id.mk

Change-Id: I30a8d02c22a4fb02f10b2b238129d94d706fce22