x/build: linux image is missing openal

[crawshaw]

The linux/amd64 builder fails testing x/mobile with

# golang.org/x/mobile/exp/audio/al
../../gopath/src/golang.org/x/mobile/exp/audio/al/al_notandroid.go:22:19: fatal error: AL/al.h: No such file or directory

http://build.golang.org/log/4bbb065ef9b14874e7ed52fe2034e02eff32cc53

It may be that the test should be resilient to the library being missing so that users can run go test golang.org/x/mobile/..., but we should also be testing this code on the builders, which means the linux image needs a copy of OpenAL installed.

/cc @rakyll @adg

[hyangah]

I added openal to the the list-x86-std Dockerfile but didn't perform the process to build a new image out of it https://go-review.googlesource.com/12891

[bradfitz]

In the future, don't submit Dockerfile changes until they've been tested & deployed on the staging instance.
/cc @adg

[hyangah]

I see. Sorry for submitting it without properly testing it.
Is there a doc that I can reference for testing/staging?

[rakyll]

Should we close this issue now?

[bradfitz]

Not yet.

@evandbrown just about has Kubernetes builders working, and it's using the new Dockerfile image with these libraries, so let's wait to close this until that works.

[bradfitz]

Fixed by @eliasnaur recently in https://go-review.googlesource.com/c/build/+/164658