We are aware that a builder is missing, and have the tracking issue
golang.org/issue/41610 for resolving that. Add a skip to the tests
so that the build dashboard is green until the work of adding the
builder is complete.

For golang/go#41610.

Change-Id: I69dbeb4c28d5567f24b4570f44715d8b5443365f
Reviewed-on: https://go-review.googlesource.com/c/build/+/257117
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>

Create the builder as a post-submit builder with a non-zero KnownIssue
value first. Once we know it works well, we'll have the confidence to
be able to safely promote it to a normal TryBot, without the risk of
causing disruption for contributors.

For golang/go#41610.

Change-Id: If871addf325b7728109afbe094b72d40e27ceec1
Reviewed-on: https://go-review.googlesource.com/c/build/+/257617
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>

Since sending CL 257617, I've learned that iOS was never a supported
target for misc-compile. It was always filtered out unconditionally
in GOROOT/src/buildall.bash, and the comment suggesting that we test
iOS targets was inaccurate.

Remove the naive misc-compile-ios builder since it's not expected to
start working soon, and update misc-builder architecture filtering
code and comments to match the current reality better.

After this change, it will be viable to remove mobile target filtering
from GOROOT/src/buildall.bash. If that's done, then x/build/dashboard
will become a centralized place for all misc-builder target selection.

Ignore darwin-arm in TestTryBotsCompileAllPorts so the test doesn't
fail when executed with Go 1.14. Not having that builder is intended.

For golang/go#41610.
Updates golang/go#25963.

Change-Id: Ic6f5dc95edb67f8e6ebc0a77979e55eb0cc325cb
Reviewed-on: https://go-review.googlesource.com/c/build/+/258057
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>

Updates golang/go#41610

Change-Id: Ie8cb3294da5566e09fc06c01e679b8b773a439cf
Reviewed-on: https://go-review.googlesource.com/c/build/+/259358
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Elias Naur <mail@eliasnaur.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

Mobile targets are not supported by misc-compile trybots, as tracked in
golang.org/issue/25963, and need to be filtered out. The buildall.bash
script was created in CL 9438, back when it was a single all-compile
builder, and it was easier to filter out mobile targets in the script
than to come up with a pattern that matches all non-mobile targets.

As of CL 254740, all mobile targets (Android and iOS) have unique GOOS
values. That makes it it easy to filter them out in x/build/dashboard.
This was done in CL 258057. As a result, it's now viable to simplify
this script and perform all misc-compile target selection in x/build,
rather than having it spread it across two places.

Also, as of CL 10750, the all-compile builder has turned into multiple
misc-compile builders, so update the script description accordingly.

Updates #41610.

Change-Id: I1e33260ac18cf0a70bb68cd8e3db5587100c7e87
Reviewed-on: https://go-review.googlesource.com/c/go/+/257962
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>

Updates golang/go#41610

Change-Id: I9a2e151eaf8104e2f3a1a8d36f8dc72a6351fd4a
Reviewed-on: https://go-review.googlesource.com/c/build/+/259580
Trust: Elias Naur <mail@eliasnaur.com>
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>