Add missing RSA_pkey_ctx_ctrl prototype for OpenSSL 1.0 compilation

Author: bartonjs

src/libraries/Native/Unix/System.Security.Cryptography.Native/opensslshim.h

@@ -148,6 +148,7 @@ void RSA_get0_factors(const RSA* rsa, const BIGNUM** p, const BIGNUM** q);
 void RSA_get0_key(const RSA* rsa, const BIGNUM** n, const BIGNUM** e, const BIGNUM** d);
 int32_t RSA_meth_get_flags(const RSA_METHOD* meth);
 const RSA_METHOD* RSA_PKCS1_OpenSSL(void);
+int32_t RSA_pkey_ctx_ctrl(EVP_PKEY_CTX* ctx, int32_t optype, int32_t cmd, int32_t p1, void* p2);
 int32_t RSA_set0_crt_params(RSA* rsa, BIGNUM* dmp1, BIGNUM* dmq1, BIGNUM* iqmp);
 int32_t RSA_set0_factors(RSA* rsa, BIGNUM* p, BIGNUM* q);
 int32_t RSA_set0_key(RSA* rsa, BIGNUM* n, BIGNUM* e, BIGNUM* d);