internal/rosa/make: migrate to helper interface

This also updates all affected artifacts to use new behaviour.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/zlib.go

@@ -7,15 +7,17 @@ func (t Toolchain) newZlib() pkg.Artifact {
 		version  = "1.3.1"
 		checksum = "E-eIpNzE8oJ5DsqH4UuA_0GDKuQF5csqI8ooDx2w7Vx-woJ2mb-YtSbEyIMN44mH"
 	)
-	return t.NewViaMake("zlib", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("zlib", version, pkg.NewHTTPGetTar(
 		nil, "https://zlib.net/zlib-"+version+".tar.gz",
 		mustDecode(checksum),
 		pkg.TarGzip,
-	), &MakeAttr{
-		OmitDefaults: true,
+	), &PackageAttr{
 		Env: []string{
 			"CC=clang -fPIC",
 		},
+	}, &MakeHelper{
+		OmitDefaults: true,
+
 		Host:  `""`,
 		Build: `""`,
 	})