The config-host.h, $TARGET_NAME-config-target.h,
$TARGET_NAME-config-devices.h files are now generated by
configure_file() rather than scripts/create_config. Adjust
he relevant paragraph in docs/devel/build-system.rst, and take
the occasion to fix a preexisting confusion of *.h vs *.mak.
Reported-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>