vendor: update golang.org/x/crypto/chacha20poly1305
Updates golang.org/x/crypto/chacha20poly1305 to rev
cb497ae for:
- chacha20poly1305: fix detection of BMI on amd64 (https://golang.org/cl/34852)
- chacha20poly1305: fix typos (https://golang.org/cl/34536)
- chacha20poly1305: fix typos (https://golang.org/cl/33855)
- chacha20poly1305: fix build constraints (https://golang.org/cl/32391)
Change-Id: I3a608b5e21b3a72b5aaa5d0afe6c6cffbb1d6fc1
Reviewed-on: https://go-review.googlesource.com/34871
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>