net/http: update bundled http2 for Transport double STREAM_ENDED error
net/http: update bundled http2 for Transport double STREAM_ENDED error

Updates bundled http2 to x/net/http2 git rev 7394c11 for:

http2: fix protocol violation regression when writing certain request bodies
https://golang.org/cl/27406

Fixes #16788

Change-Id: I0efcd36e2b4b34a1df79f763d35bf7a3a1858506
Reviewed-on: https://go-review.googlesource.com/27451
Run-TryBot: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

nawawi/go,linux-on-ibm-z/go,golang/go,ImJasonH/go,golang/go,josharian/go,polyverse-security/go,suncycheng/go,Cofyc/go,josharian/go,polyverse-security/go,josharian/go,momchil-velikov/go,derekmarcotte/go,suncycheng/go,josharian/go,linux-on-ibm-z/go,momchil-velikov/go,golang/go,polyverse-security/go,polyverse-security/go,akutz/go,golang/go,akutz/go,Cofyc/go,cloudflare/go,ImJasonH/go,linux-on-ibm-z/go,ImJasonH/go,nawawi/go,cloudflare/go,golang/go,nawawi/go,suncycheng/go,vsekhar/elastic-go,linux-on-ibm-z/go,codestation/go,vsekhar/elastic-go,goodlang/good,vsekhar/elastic-go,nawawi/go,polyverse-security/go,derekmarcotte/go,goodlang/good,momchil-velikov/go,polyverse-security/go,josharian/go,Cofyc/go,derekmarcotte/go,vsekhar/elastic-go,vsekhar/elastic-go,akutz/go,suncycheng/go,golang/go,suncycheng/go,momchil-velikov/go,josharian/go,josharian/go,CAFxX/go,linux-on-ibm-z/go,cloudflare/go,ImJasonH/go,CAFxX/go,derekmarcotte/go,golang/go,nawawi/go,goodlang/good,CAFxX/go,ImJasonH/go,derekmarcotte/go,CAFxX/go,codestation/go,goodlang/good,codestation/go,cloudflare/go,josharian/go,CAFxX/go,polyverse-security/go,vsekhar/elastic-go,linux-on-ibm-z/go,ImJasonH/go,vsekhar/elastic-go,derekmarcotte/go,codestation/go,ImJasonH/go,cloudflare/go,momchil-velikov/go,golang/go,christopher-henderson/Go,polyverse-security/go,CAFxX/go,derekmarcotte/go,akutz/go,goodlang/good,codestation/go,nawawi/go,Cofyc/go,suncycheng/go,linux-on-ibm-z/go,Cofyc/go,CAFxX/go,cloudflare/go,codestation/go,cloudflare/go,Cofyc/go,goodlang/good,goodlang/good,akutz/go,vsekhar/elastic-go,CAFxX/go,goodlang/good,momchil-velikov/go,nawawi/go,linux-on-ibm-z/go,Cofyc/go,codestation/go,Cofyc/go,ImJasonH/go,cloudflare/go,momchil-velikov/go,suncycheng/go,nawawi/go,derekmarcotte/go,momchil-velikov/go,codestation/go,akutz/go,akutz/go,suncycheng/go,akutz/go