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 branch 'linaro_android_4.2.2' of git://android.git.linaro.org/platform/libcore into jb-mv