add update 14.1 and 14.2

README_gc.md

@@ -35,3 +35,5 @@ Golang 编程：245386165
 |2015-12-10|15.0 15.1 15.2
 |2015-12-12|15.3
 |2015-12-22|15.4
+|2015-12-25|14.1
+|2015-12-28|14.2