support .gz package files

sign.sh

@@ -0,0 +1,5 @@
+#! /bin/bash
+set -e
+
+dpkg-sig $@ &
+wait $last_pid

src/main.go

@@ -177,7 +177,7 @@ func signFiles(path string) {
 func sign(ch chan bool, path string) {
 	if strings.HasSuffix(path, ".deb") {
 		fmt.Printf("Signing %s \n", path)
-		cmd := exec.Command("dpkg-sig", "--sign", "builder", path)
+		cmd := exec.Command("../sign.sh", "--sign", "builder", path)
 		err := cmd.Run()
 		if err != nil {
 			panic(err)