samples: add Terra samples

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

samples/Terra/antiquote3.t

@@ -0,0 +1,16 @@
+
+
+function omgfunc()
+	return 2
+end
+
+a = global(0)
+
+terra foo()
+	[quote a = a + 1 end];
+	[{quote a = a + 1 end,quote a = a + 1 end}]
+	return a
+end
+
+local test = require("test")
+test.eq(foo(),3)