Adding support for multi-architecture images and binaries

[xunholy]

Fixes:

• package architecture (arm) does not match system (arm64) #140
• cloudflared won't launch on Raspberry Pi 3 running on Ubuntu 18.04 #115
• ARMv8 builds #60

Note: Should also consider consolidating the following pull request if you wish to support releasing the binary.

• add arm64 support #173

[unicomp21]

Will this work on the newly released m6g/graviton2 processors from AWS as well?

[xunholy]

Bump**
@sssilver would you know who is the best person to review this pull request?

[sssilver]

@xunholy Hi! Sorry this took a while. We'll get this reviewed in a day or so and get it merged! Thank you so much for your contribution~

[xunholy]

Thanks @sssilver & @acmacalister - I just wasn't sure what the process was to have this reviewed. Appreciate your time 👍

[Michael9127]

It seems that this doesnt support windows builds. GOOS=windows fails.

Also, could you please squash these commits into one.

[acmacalister]

@xunholy looks good, thanks for your PR! As @Michael9127 noted, can we add Windows as build arch?

[xunholy]

I've squashed commits as requested, usually, I find it easier to just squash and merge but I'm easy either way.

[xunholy]

Just used the logic TARGET_OS=windows make cloudflared which works when building until it hits a failure for the following reason:

cmd/cloudflared/windows_service.go:19:2: errors redeclared as imported package name
	previous declaration at cmd/cloudflared/windows_service.go:16:2
make: *** [cloudflared] Error 2

Not sure when this was last tested however, I could see "github.com/pkg/errors" was being imported twice.

Once I removed the duplicate windows build works fine. @Michael9127 @acmacalister

[acmacalister]

Thanks @xunholy. Surprised it has a build error, as we distribute Windows builds on every release

[xunholy]

No worries, using the command I mentioned and with the small fix I can build windows fine with these changes.

Please let me know if there is anything else you'd like from my end.