Add some test runners.

Examples/test-suite/javascript/disown_runme.js

@@ -0,0 +1,22 @@
+var disown = require("./disown");
+
+var a = new disown.A();
+var tmp = a.thisown;
+a.thisown = 0
+if (a.thisown) {
+  throw new Error("Failed.");
+}
+a.thisown = 1
+if (!a.thisown) {
+  throw new Error("Failed.");
+}
+a.thisown = tmp
+if (a.thisown != tmp) {
+  throw new Error("Failed.");
+}
+
+var b = new disown.B();
+b.acquire(a);
+if (a.thisown) {
+  throw new Error("Failed.");
+}