[automerger skipped] Make libbnnmlowp buildable for native_bridge am: 4cc9a2fd0a am: f2c261c01c -s ours

am skip reason: Change-Id I49fb7d0553555f13dea6c9e5fc733b97228ff1c3 with SHA-1 4cc9a2fd0a is in history

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

Change-Id: I48709f5f43625fcabcd4f7ab51685963322292ba