See upstream's 70d8b304d01b9e0c4ec182db20c33aa0698cda51. Also import
upstream's AES-192-GCM tests, now that we support that in EVP_CIPHER
too.
Bug: 494
Change-Id: I157ebe23f32147214641aeb664ce7db2e21bf86a
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/55389
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>