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/libcap.go

@@ -42,9 +42,7 @@ ln -s ../system/bin/bash /bin/
 	), version
 }
 func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newLibcap,
-
+	native.mustRegister(Toolchain.newLibcap, &Metadata{
 		Name:        "libcap",
 		Description: "a library for getting and setting POSIX.1e draft 15 capabilities",
 		Website:     "https://sites.google.com/site/fullycapable/",