Add support for TARGET_RECOVERY_BRICK.

TARGET_RECOVERY_BRICK specifies the file that lists all the partitions
to be bricked under recovery. The file, if present, will be copied to
'$(TARGET_RECOVERY_ROOT_OUT)/etc/recovery.brick'.

Bug: 27253717
Change-Id: Id84195b5ee1031a83bf7a077be070a3728416580
(cherry picked from commit 3051f4f1)