"Set CPU-specific optimizations.."
"build: Fix disabling PIE"

Commit 419b722 was not cherry-picked
properly and the correct cflags were never set

Change-Id: I3bc6014fe791e2e8a4cca5106e70f23279c5e43c
"build: Set ccache base to build top"

This enables ccache sharing between different build tree paths.

Change-Id: I99636bdd2779a6ccf0649f027e35cf67df44b6ae
"Don't set CCACHE_BASEDIR if its already set"

* enable use of shared ccache

Change-Id: Ic708a5d5169291d674b167aa2c87bf2c8adaafae
Merge pull request #4 from SpeedGroup/android-4.4

upgrade branch