external/boringssl: Sync to 3989c99706bf30054798ff82f1cb010e50e385f5. am: 92a0f790a5 am: 3bd9db26a9 am: bace54d8df

Original change: https://android-review.googlesource.com/c/platform/external/boringssl/+/1455436

Change-Id: Ib10782b55c8a7f5998f601cbdd3101a7b0f2703e