rs: Fix aliasing violations

Fix aliasing violations so frameworks/rs can be compiled
without -fno-strict-aliasing

Change-Id: I39dee4712eca722c641741074fa1dbd49414b8cd
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
rs: Use -Wno-error - gcc 4.7 adds new warnings rs can't deal with

Change-Id: I38fe66629552d6f11be1bb69d5a93a05251614df
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>

Conflicts:
	Android.mk