Add all the assignment code.

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

hw6/hw5programs/compile_func_argument.oat

@@ -0,0 +1,9 @@
+int call((int) -> int f, int arg) {
+  return f(arg);
+}
+
+int inc(int x) { return x + 1; }
+
+int program(int argc, string[] argv) {
+  return call(inc, 3);
+}