improve ccache support

Change-Id: I5401f7068d6f830adba293eadbbe307e6bf736f8
fix graphite optimization support

Change-Id: Ifa79b8714559d5d8710aaa6a17e9b26ffd226304
Merge pull request #1 from eugenesan/jellybean
reverting ccache nostats

Change-Id: Ide52e34c73638e3a64e2d3f1c6ff43ff48325049
Merge branch 'pa-jellybean' into pa-jellybean-openpdroid