internal/rosa: create metadata alongside artifact

This enables deferring evaluation of azalea-based packages and fixes the longstanding quirk of version being disjoint from other metadata.

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

internal/rosa/freetype.go

@@ -15,9 +15,7 @@ func (t Toolchain) newFreetype() (pkg.Artifact, string) {
 	), nil, (*MakeHelper)(nil)), version
 }
 func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newFreetype,
-
+	native.mustRegister(Toolchain.newFreetype, &Metadata{
 		Name:        "freetype",
 		Description: "a freely available software library to render fonts",
 		Website:     "http://www.freetype.org/",