x/mobile: support appletvos / appletvsimulator / xros

[AddIcechan]

How can one support compiling for appletvos / appletvsimulator / xros

[mauri870]

cc @hyangah per https://dev.golang.org/owners

[protonjohn]

Hello, commenting to add my interest.

If somebody can direct me to the necessary files to change, I'd be happy to take a crack at a pull request.

[protonjohn]

I have a tentative pull request created at golang/mobile#102, @hyangah please let me know how I can format my change to suit your conventions.

[gopherbot]

Change https://go.dev/cl/587776 mentions this issue: cmd/gomobile: add support for Apple TV and XROS