Archive arm dartsdks on every revision

[mkustermann]

Currently the dartsdk builders do not seem to archive arm sdk zip files.

The dartsdk bundles can be found e.g. here for a bleeding edge revision and it is missing an arm version:

$ gsutil ls gs://dart-archive/channels/be/raw/136190/sdk/
...

Same is true for all builders, also for stable (see gs://dart-archive/channels/stable/raw/1.14.1/sdk). There is also no support for that in the GCSNamer.

But they suddenly appear in the promoted release folder. Comparing the timestamps on them (e.g. gsutil ls -lh gs://dart-archive/channels/stable/release/1.14.1/sdk) it looks like they are uploaded from the side from somewhere else. From where?

@whesse Can't we have dartsdks for arm be archived as everything else on each revision?

Some context: Dartino is using DartVM binaries from specific revisions (sometimes from bleeding edge) and we have to get the binary for linux/linux-arm/mac/windows. So for now we need to log into the buildbot to get them, since they don't seem to be automatically archived.

cc @ricowind

[whesse]

Yes, this is clear, we need to create the SDK on the builders rather than creating one afterwards by a hack.

[athomas]

Fixed.