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
Merge branch 'cm-12.0' of https://github.com/CyanogenMod/android_build into cm-12.0