emulators/yuzu: unbreak on FreeBSD < 12 after c8b56ee72403

externals/./cpp-httplib/httplib.h: In constructor 'httplib::SSLServer::SSLServer(const char*, const char*, const char*, const char*)':
externals/./cpp-httplib/httplib.h:6728:22: error: 'TLS_method' was not declared in this scope; did you mean 'DTLS_method'?
6728 | ctx_ = SSL_CTX_new(TLS_method());

|                      ^~~~~~~~~~
|                      DTLS_method

Reported by: pkg-fallout