Update wolfSSL to version which already includes wolfSSL's #2036

https://github.com/cloud-security-research/sgx-ra-tls/blob/05ee68aad898e85ee1142ae257167666e501d977/Makefile#L228

Backporting wolfSSL's #2036 was less work than forward-porting all existing wolfSSL patches. Eventually, forward-porting the patches is the cleaner solution though.