cloud/storage: restore PutBucketACLRule test.

Google Cloud Storage has fixed the issue on the backend.
This fixes issue #147.

Change-Id: I386fe7934b2ddb1f4eaeebc5e767ace3b761c63c

storage/integration_test.go

@@ -275,7 +275,7 @@ func TestACL(t *testing.T) {
 	if err := DeleteACLRule(ctx, bucket, name, entity); err != nil {
 		t.Errorf("Can't delete the ACL rule for the entity: %v", entity)
 	}
-	/* TODO(gmlewis): uncomment this section when Cloud Storage Bucket ACL APIs are working again.
+
 	if err := PutBucketACLRule(ctx, bucket, "[email protected]", RoleReader); err != nil {
 		t.Errorf("Error while putting bucket ACL rule: %v", err)
 	}
@@ -295,7 +295,6 @@ func TestACL(t *testing.T) {
 	if err := DeleteBucketACLRule(ctx, bucket, "[email protected]"); err != nil {
 		t.Errorf("Error while deleting bucket ACL rule: %v", err)
 	}
-	*/
 }
 
 func cleanup(t *testing.T, prefix string) {