* fix: custom targets if missing goamd64, goarm, gomips
if the user provide custom targets without the goamd64, goarm or gomips bit, things may go awry at some point.
this prevents issues by suffixing them with the default when its missing.
closes https://github.com/goreleaser/goreleaser/issues/3055
Signed-off-by: Carlos A Becker <caarlos0@gmail.com>
* test: fix build tests
Signed-off-by: Carlos A Becker <caarlos0@gmail.com>