Tweak API level for posix_memalign on Android
Tweak API level for posix_memalign on Android

google/gemmlowp,google/gemmlowp,petewarden/gemmlowp,petewarden/gemmlowp,maciekcc/gemmlowp,maciekcc/gemmlowp,google/gemmlowp,google/gemmlowp,maciekcc/gemmlowp,petewarden/gemmlowp,petewarden/gemmlowp