package/go: ensure there is a host-go provider
Commit fa2536ec9401 (package/go: make host package a virtual package)
introduced host-go as a host-only virtual package, which had a single
provider, the choice of which is only exposed when a (target or host)
package has selected BR2_PACKAGE_HOST_GO to indicate it needs host-go.
However, this forgot to account for prompt-less, host-only packages,
which have no way of selecting that symbol.
Having prompt-less, host-only packages is a totally unexceptional,
supported case; for example a host package can be depended upon by
another (target or host) package, or by a filesystem, and we do not
require Kconfig symbols to be exposed for those packages.
As a consequence, when not package is enabled, that can select that
symbol, we can't run 'make source' or 'make host-foo-source':
make[1]: *** No rule to make target 'host-', needed by
'[...]/build/host-go-1.22.4/.stamp_configured'. Stop.
Fix that by moving the provider symbol out of the if-block, so that
there is always a provider defined.
Now, we only have host-go-src as a provider, but the symbol is still
part of the choice that is conditional (and that _has_ to be
conditional), so the BR2_PACKAGE_HOST_GO_SRC can never be set unless
there is a package that explicitly select BR2_PACKAGE_HOST_GO.
So, drop the conditional on the default, so that there is always a
provider available.
This mirrors other similar situations, like the rust case.
Fixes: fa2536ec940105acc71630144bd1187c931462ac
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
LGTM: Arnout Vandecappelle (Essensium/Mind) (on IRC) <arnout@mind.be>
Yann E. MORIN