[automerger skipped] Make libbnnmlowp buildable for native_bridge am: 4cc9a2fd0a -s ours

am skip reason: Change-Id I49fb7d0553555f13dea6c9e5fc733b97228ff1c3 with SHA-1 ebffc28dbb is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/gemmlowp/+/12128242

Change-Id: Ia56ec8a3db5c12e2bd3deee60fbcc621d6e4d332