Edify: Add/Update abort messages for some asserts

* If a bootloader or baseband assert is not satisfied, print the
  versions that are supported by the package as well as the version
  on the device.

Change-Id: I958d49281c51bd4e60d596a727bb94cfc4a21909
ota: Build uboot bootable images when necessary

Conflicts:
	core/Makefile
	tools/releasetools/common.py

Change-Id: I18996bb1f5377bbf369fb41774aaa1f5821e7d1f
Enable QCOM_BSP_LEGACY flag for pre-8974 targets

Change-Id: I895f1b1cbad0d260e1bca87ccb61e6194de023fd
Allow specifying kernel toolchain and prefix

Change-Id: Ib75cfe772e073f2196455f3e3dfba247f6b3feff
build: recovery: Support adding device-specific items

(cdesai): Also add the relevant parts from koush's
commit 7fd5a89df5ec3961c9aedfd2afad50d6d2561056
"Add initial support for charge mode. also support recovery/root in the device tree to easily copy props into recovery images."

Change-Id: I25205e68282680932917016646dabd1abadbfce6