TLS_RSA_WITH_AES_128_GCM_SHA256 and TLS_RSA_WITH_AES_256_GCM_SHA384
are also blacklisted in RFC 7540 Appendix A.

Because they are were implemented in Go 1.6, the isBadCipher
function has been moved into the version-tagged files so that the
repo doesn't break for Go 1.5 users.

Change-Id: If8ca058ede51e9a4a337ce8d645cfd9f370d49b4
Reviewed-on: https://go-review.googlesource.com/24214Reviewed-by: Adam Langley <agl@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>