go, go-1.4: can't read "GOARCH": no such variable

[ryandesign (Ryan Carsten Schmidt)]

go and go-1.4 fail to parse on PowerPC systems:

can't read "GOARCH": no such variable

This is because you removed

    default {
        # unsupported arch, but GOARCH needs to be set to something to prevent errors
        set GOARCH x
        set cmd_prefix 6
    }

from the switch ${build_arch} statement in r140801.

It's fine if a port doesn't install on PowerPC, but please at least don't cause the port to fail to parse, because users see that error when selfupdating or syncing, and because it prevents valid commands like "sudo port clean all" from completing.

[ci42]

Thanks for catching that. Fixed in r140807.