[automerger skipped] Make libbnnmlowpV8 buildable for native_bridge am: 8c5fba4013 am: de847ae085 am: f96628cfe2 -s ours am: 13f182c946 -s ours

am skip reason: Change-Id Ic4a9c4b926731af5992cfd27193ede53e0178c88 with SHA-1 8c5fba4013 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/gemmlowp/+/12128243

Change-Id: Ic83d2f1358077f9ccbbf6f2ca1510c9476c44a38