internal/rosa: provide package metadata

This had to be done out-of-band because there was no way to efficiently represent these within Artifact.

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

internal/rosa/musl.go

@@ -6,7 +6,7 @@ func (t Toolchain) newMusl(
 	headers bool,
 	env []string,
 	extra ...pkg.Artifact,
-) pkg.Artifact {
+) (pkg.Artifact, string) {
 	const (
 		version  = "1.2.5"
 		checksum = "y6USdIeSdHER_Fw2eT2CNjqShEye85oEg2jnOur96D073ukmIpIqDOLmECQroyDb"
@@ -50,10 +50,16 @@ rmdir -v /work/lib
 		Env: env,
 	}, &helper,
 		Coreutils,
-	)
+	), version
 }
 func init() {
-	artifactsF[Musl] = func(t Toolchain) pkg.Artifact {
-		return t.newMusl(false, nil)
+	artifactsM[Musl] = Metadata{
+		f: func(t Toolchain) (pkg.Artifact, string) {
+			return t.newMusl(false, nil)
+		},
+
+		Name:        "musl",
+		Description: "an implementation of the C standard library",
+		Website:     "https://musl.libc.org/",
 	}
 }