Update get uec image

Change-Id: I8fe4ef7eaf59abc625630415c94839b426989601
update warm apts

Change-Id: I34705e722b6538e7cad156a60e95ed6729b7b3b8
build uec ramdisk

Change-Id: I7a77b55b8ca780363177be843ed9733a743298f4
Merge branch 'pip-redirect' into dt-test
Merge branch 'usb-prereq' into dt-test
Merge branch 'conf-tempest' into dt-test