fix the build of the scalar fallback
fix the build of the scalar fallback

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