Make more uniform GO build options.

Avoid building any of the GO stuff:

   make GOLANG=no ...

Build with a specific build of GO:

   make GO=~/sdk/go1.16rc1/bin/go ...

Also, now https://github.com/golang/go/issues/43149 is resolved in the
go1.16rc1 build (it does not work in the go1.16beta1 but we don't support
that one any more), remove the forced CGO use for the go/psx-signals build.

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
4 files changed