Fix propotype to include the const qualifier

 void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx);

 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,

                        ENGINE *impl, unsigned char *key, unsigned char *iv);

                        ENGINE *impl, const unsigned char *key, const unsigned char *iv);

 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,

                       int *outl, const unsigned char *in, int inl);

 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);

 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,

                        ENGINE *impl, unsigned char *key, unsigned char *iv);

                        ENGINE *impl, const unsigned char *key, const unsigned char *iv);

 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,

                       int *outl, const unsigned char *in, int inl);

 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm, int *outl);

 int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,

                       ENGINE *impl, unsigned char *key, unsigned char *iv, int enc);

                       ENGINE *impl, const unsigned char *key, const unsigned char *iv, int enc);

 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,

                      int *outl, unsigned char *in, int inl);

                      int *outl, const unsigned char *in, int inl);

 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm, int *outl);

 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,

                     unsigned char *key, unsigned char *iv);

                     const unsigned char *key, const unsigned char *iv);

 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);

 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,

                     unsigned char *key, unsigned char *iv);

                     const unsigned char *key, const unsigned char *iv);

 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *outm, int *outl);

 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,

                    unsigned char *key, unsigned char *iv, int enc);

                    const unsigned char *key, const unsigned char *iv, int enc);

 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *outm, int *outl);

 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *x, int padding);