disable -O3 but Krait optimisations stays
-O3 caused some devices to boot into black screen (kernel start failour)
In meanwhile -O3 stays disabled until we find a solution.
Since Krait optimisations seems to be helpful, they stays.

Change-Id: Ib80e0b1d6e1d1fbdec50bac011b7aa18b3b46747
increase headphones safe volume level
With 4.3 audio levels, especially headphones, are lower then previousely.
This commit might help, reports are welcome.

Change-Id: Iedae891c1f18eeebe178214a41d70ae3f784f569