internal/rosa: gen_init_cpio artifact

This works much better than hacking around the toybox cpio implementation.

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

internal/rosa/all.go

@@ -43,6 +43,7 @@ const (
 	GMP
 	GLib
 	Gawk
+	GenInitCPIO
 	Gettext
 	Git
 	Go
@@ -187,6 +188,7 @@ func ResolveName(name string) (p PArtifact, ok bool) {
 		"gmp":               GMP,
 		"glib":              GLib,
 		"gawk":              Gawk,
+		"gen_init_cpio":     GenInitCPIO,
 		"gettext":           Gettext,
 		"git":               Git,
 		"go":                Go,