added ant goal to compile the testlib test cases

testlib/module.kt

@@ -0,0 +1,10 @@
+import kotlin.modules.*
+
+fun project() {
+    module("testlib") {
+        // TODO how to refer to the dir of the module?
+        classpath += "testlib/lib/junit-4.9.jar"
+
+        addSourceFiles("test")
+    }
+}