Missing function X509_STORE_CTX_set0_trusted_stack

In the [grpc](https://github.com/grpc/grpc) repo, we are using this boringSSL-SwiftPM library for our iOS build. Recently, we had a change where we try to use the `X509_STORE_CTX_set0_trusted_stack` function but we discovered that that function is not here. The function was present in the `google/boringssl` library: https://github.com/google/boringssl/blob/main/include/openssl/x509.h#L3137

Is that something that can be added?