Make libbnnmlowp buildable for native_bridge am: ebffc28dbb am: 3c25e3c4f7 am: 7420449dd2 am: ac112fa093 am: a14c24f849

Original change: https://android-review.googlesource.com/c/platform/external/gemmlowp/+/1328959

Change-Id: Ibe9018bbc5b05eda3768e20aa719e64bfcf787bf