AES-GCM and RSA are already included in 1.5, so it's just the elliptical curve improvements that have the Intel licensing issue. According to the author, they are unlikely to land in 1.6, but he is hopeful for 1.7.
https://github.com/cloudflare/go/issues/8
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[ 2.7 ms ] story [ 15.5 ms ] threadThe earlier slides noted Go's crypto was much slower, but there was nothing obvious about "what's left to do".