libcrypto: import a copy of OpenSSL 1.1's cmeth_lib.c

libcrypto: import a copy of OpenSSL 1.1's cmeth_lib.c

This is the file as of OpenSSL 1.1.1 commit 82dfb986. Call the file
cipher_method_lib.c since the short names in this directory are hard
enough to read. This is a first step towards providing the poorly
named EVP_CIPHER_meth_* API which is needed by some projects because
of EVP_CIPHER opacity.

ok jsing