samples: add Terra samples

source: https://github.com/zdevito/terra/tree/master/tests

samples/Terra/shallowfreeze.t

@@ -0,0 +1,24 @@
+
+
+struct B {
+	d : int
+}
+struct A {
+	b : &B;
+	c : int;
+	d : int;
+	e : int;
+}
+
+
+terra foo() : A
+	return A {nil}
+end
+
+foo:disas()
+
+print(foo())
+
+
+
+terralib.dumpmodule()