internal/rosa: add zlib runtime dependency

For transitioning to dynamically linking zlib.

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

internal/rosa/ssl.go

@@ -93,6 +93,7 @@ func init() {
 
 func (t Toolchain) newNSSCACert() (pkg.Artifact, string) {
 	return t.New("nss-cacert", 0, []pkg.Artifact{
+		t.Load(Zlib),
 		t.Load(Bash),
 		t.Load(Python),