msm8226: Update BOOTCLASSPATH and add libinit_msm

Use PRODUCT_BOOT_JARS mechanism to override BOOTCLASSPATH.
Enable libinit_msm extension library to extend init and
allow target-specific runtime initialization at boot.
Define target flag to indicate compilation along with
MSM kernel source tree.

Change-Id: I2fb54528155d2ee2cb2b28d1ef8f74041345ba6b
3 files changed