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This change pulls in the following from BoringSSL:

7ea8481 Add generic OPERATION_NOT_SUPPORTED error code.
bc8d737 Add tests for AlgorithmIdentifier support in EVP.
8f160a6 Add EVP_DigestVerifyInitFromAlgorithm and EVP_DigestSignAlgorithm.
2e1594d Remove #if-0'd ASN1_sign.
75a1dd0 Remove EVP_PKEY_CTX case in rsa_pss_to_ctx.
f4b4952 Fix rsa_pss_to_ctx return value.
5db5d4e RSA_encrypt and RSA_sign_raw aren't the same.
a87941a Remove misspelled error code.
b1659f5 Fix err_test.
57e52f2 Fix invariant broken in 5f1374e2.
5f1374e Retain ownership of malloced error data.
622a6db Fix SHA*_Final documentation.
83e52bc HASH_UPDATE always succeeds.
bce495c Fix a_{digest,verify}.c error codepaths.

BUG=none

Review URL: https://codereview.chromium.org/649503002

Cr-Commit-Position: refs/heads/master@{#299200}