clang: Use -fno-strict-aliasing

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

Change-Id: I22e36520bcc4c3196f8d5b32f021f136abecf4a6
Signed-off-by: zwliew <zhaoweiliew@gmail.com>
Clang: Silence warnings (1/3)

With GCC >=4.7 Clang generates a lot of noise with various compiler flags,
and can even break the builds when using Flags like Graphite.  This can be
reproduced by doing the following:

Setting TARGET_EXTRA_CFLAGS with Graphite flags such as these
TARGET_EXTRA_CFLAGS +=  -fgraphite-identity \
                        -floop-block \
                        -floop-strip-mine \
                        -ftree-loop-distribution \
                        -ftree-loop-linear

Causes the following errors to occure and the builds to fail:

clang: error: argument unused during compilation: '-fgraphite-identity'
                                                  '-floop-block'
                                                  '-floop-strip-mine'
                                                  '-ftree-loop-distribution'
                                                  '-ftree-loop-linear'

Silence the errors by passing the -Qunused-arguments for CFLAGS

Change-Id: I07a41603e36eb831b88f3f42308ba2b97cbd65fa
Signed-off-by: zwliew <zhaoweiliew@gmail.com>