clang: Build with -fno-strict-aliasing

Add -fno-strict-aliasing here so we don't need to use it globally

Change-Id: Ib1324f90633789417bbf6ea55d51cc2a833b6e20
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
Merge branch 'linaro_android_4.2.1' of http://android.git.linaro.org/git-ro/platform/external/clang into jb-mv-wip