This repo contains a repro case for this BoringSSL incompatibility with iOS + bitcode https://boringssl-review.googlesource.com/c/boringssl/+/37804
Run ./repro.sh to see the issue
In the WORKSPACE comment in the patches line in the boringssl rule
and run ./repro.sh again to see it fixed.