Make '**' implicit

Default to copying all entries in the input zip to the output zip.

Test: zip2zip_test
Change-Id: I0d70620c621bfeee2b7fe2a64b350b4866ad2877
diff --git a/cmd/zip2zip/zip2zip_test.go b/cmd/zip2zip/zip2zip_test.go
index 2b5b562..53c8ce2 100644
--- a/cmd/zip2zip/zip2zip_test.go
+++ b/cmd/zip2zip/zip2zip_test.go
@@ -117,6 +117,31 @@
 		},
 	},
 	{
+		name: "sort all implicit",
+
+		inputFiles: []string{
+			"RADIO/a",
+			"IMAGES/system.img",
+			"IMAGES/b.txt",
+			"IMAGES/recovery.img",
+			"IMAGES/vendor.img",
+			"OTA/b",
+			"OTA/android-info.txt",
+		},
+		sortGlobs: true,
+		args:      nil,
+
+		outputFiles: []string{
+			"IMAGES/b.txt",
+			"IMAGES/recovery.img",
+			"IMAGES/system.img",
+			"IMAGES/vendor.img",
+			"OTA/android-info.txt",
+			"OTA/b",
+			"RADIO/a",
+		},
+	},
+	{
 		name: "sort jar",
 
 		inputFiles: []string{