Kernel : Use Linaro 4.8.2 Toolchain

Change-Id: I25f67548af4244c20179437ad4ee0c68aaf8213a

Conflicts:
	envsetup.sh
Rom : Use Linaro 4.8 Toolchain // Use -O3 for Optimization

Change-Id: I2536a57ef644a17a3fb06aeaca420a1fda43f224
Hide more warnings

Change-Id: I6a6b768efa10a1f7419856d98ceefda41c6d4e37