<kotlinc> ant task now supports <src> element and multiple source directories

compiler/integration-tests/testData/antTaskJvmManyRoots/root1/hello.kt

@@ -0,0 +1,7 @@
+package Hello
+
+fun main(args : Array<String>) {
+    for (s in arrayList("a"))
+      println("Hello, $s!")
+    foo()
+}