Make libbnnmlowpV8 buildable for native_bridge am: ca41a583fa am: 9a1064499e am: 64224bd699 am: 3ae8449de3 am: d04b3fb7ba

Original change: https://android-review.googlesource.com/c/platform/external/gemmlowp/+/1354665

Change-Id: I64d77a90db78c459ff0c3ee1e8332e6f42c26abf