net/http: update bundled x/net/http2
Updates x/net/http2 to git rev
1da14a5a36f220ea3f03470682b737b1dfd5de22 for:
http2: make empty method mean GET
https://golang.org/cl/169557 (Fixes golang/go#31061)
http2: don't hang a stream if trailers values are not provided
https://golang.org/cl/161958
Change-Id: I628af8c6d07d19e8f19ee37637243f6c242ef3a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/174677
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>