selinux: fix userfastboot image in enforcing mode

Userfastboot needs to use the loop device to mount and verify the
bootloader image before flashing.
Allow interactive console to start on eng and userdebug builds for
debugging purposes.
Allow userfastboot and dhcp to be started from init domain. The first
is our fastboot implementation and the second is required for obtaining
an IP over Ethernet on Minnowboard.

BUG=none
Change-Id: I4b19aac1f57c5723cbd36f82c8637766aa12a629
Signed-off-by: Mihai Serban <mihai.serban@intel.com>
Signed-off-by: Stefan Stanacar <stefan.stanacar@intel.com>
5 files changed