Created by: hustliyilin

These functions are defined by sgx-ra-tls in sgx-ra-tls/ra_tls.edl. If not implemented in ra-tls/pal, running stub enclave with rune couldn't dlopen liberpal-stub.so with undefined symbol ocall_sgx_init_quote or ocall_remote_attestation.

Signed-off-by: Yilin Li YiLin.Li@linux.alibaba.com