samples: add Terra samples

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

samples/Terra/quoteblock.t

@@ -0,0 +1,12 @@
+
+local a = symbol()
+local myquote = quote
+	var [a] = 3
+end
+
+terra bar()
+	[myquote];
+	return [a]
+end
+
+print(bar())