Update hw4 to a newer version.

Signed-off-by: jmug <u.g.a.mariano@gmail.com>

hw4/hw4programs/easy_p3.oat

@@ -0,0 +1,22 @@
+string bar (int x, string y) {
+  var s = "This is a string";
+  var array = new int[]{1, 3};
+  var y = array[0];
+  return s;
+}
+
+void proc1 () {
+  proc2 ( );
+  return;
+}
+
+void proc2 ( ) {
+  proc1 ( );
+  return;
+}
+
+bool foo ( int x, int[] y ) {
+  var s = bar (x, "cis341");
+  proc1 ();
+  return true;
+}