internal/rosa: early toybox variant

This is a variant of toybox with unfinished tools enabled, for artifacts that will end up in a dependency loop without them.

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

internal/rosa/git.go

@@ -11,6 +11,8 @@ func (t Toolchain) newGit() pkg.Artifact {
 	)
 	return t.New("git-"+version, 0, stage3Concat(t, []pkg.Artifact{},
 		t.Load(Make),
+		t.Load(Gawk),
+		t.Load(Coreutils),
 		t.Load(Perl),
 		t.Load(M4),
 		t.Load(Autoconf),