Build a static copy of bootctrl for recovery.

When accesing the boot_control HAL from recovery, we need to use a
static version of it since we can't dynamically load a HAL from
recovery. This patch adds the require bootctrl module that will be used
by update_engine_sideload.

Bug: 27178350
TEST=Built update_engine_sideload with this library.

Change-Id: I8aee9e35436cbe161761fcb79d8a74098ec6501b