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

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

Change-Id: I0c77a42ebd5298c54996f80d2851b646fb82c1ac