samples: add Terra samples

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

samples/Terra/cbool.t

@@ -0,0 +1,13 @@
+
+
+C = terralib.includecstring [[
+	_Bool And(_Bool a, _Bool b) { return a && b; }
+]]
+
+
+terra foobar(a : bool, b : bool)
+	return C.And(a,b)
+end
+
+assert(foobar(false,true) == false)
+assert(foobar(true,true) == true)