Fixes issue when updating tzdata on windows, which failed do to an incor...

...rect classpath.
The windows tzdata update fails because the classpath has not been updated to reflect more recent changes to the build framework of this project.

![classpath_fix](https://cloud.githubusercontent.com/assets/2754030/3461710/c8832360-0225-11e4-81d2-b48b2f499d91.jpg)