libcore/luni: Use -fno-strict-aliasing for now

This will be reverted once we have a proper fix.

Change-Id: Iab4663a5f96ff9770371f54697aa872260037ac1
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
Merge remote-tracking branch 'linaro/linaro_android_4.2.2' into 4.2.2