Merge pull request #591 from viperproject/carbon_issue_0422

add regression test for Carbon issue 422

Author: gauravpartha

src/test/resources/all/issues/carbon/0422.vpr

@@ -0,0 +1,9 @@
+method m1() {
+  while (true) {
+      goto bubble
+  }
+  label bubble
+}
+
+
+method m2() { }