libcrypto.num: add EVP_enc_null_hmac_sha384 #991

Job	Run time
compiler (gcc-7, ubuntu-20.04)	57s
compiler (gcc-8, ubuntu-20.04)	1m 2s
compiler (gcc-9, ubuntu-20.04)	58s
compiler (gcc-10, ubuntu-20.04)	53s
compiler (gcc-11, ubuntu-22.04)	1m 5s
compiler (gcc-12, ubuntu-22.04)	1m 5s
compiler (gcc-13, ubuntu-22.04, ubuntu-toolchain-r/test)	1m 10s
compiler (clang-6.0, ubuntu-20.04)	1m 9s
compiler (clang-7, ubuntu-20.04)	1m 14s
compiler (clang-8, ubuntu-20.04)	1m 6s
compiler (clang-9, ubuntu-20.04)	1m 14s
compiler (clang-10, ubuntu-20.04)	1m 2s
compiler (clang-11, ubuntu-20.04)	1m 2s
compiler (clang-12, ubuntu-20.04)	1m 9s
compiler (clang-13, ubuntu-22.04)	1m 11s
compiler (clang-14, ubuntu-22.04)	1m 11s
compiler (clang-15, ubuntu-22.04, jammy)	1m 12s
compiler (clang-16, ubuntu-22.04, jammy)	1m 29s
compiler (clang-17, ubuntu-22.04, jammy)	1m 17s
	21m 26s

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