Update ssdeep to 2.11.1, fixing libfuzzy shared library compilation issue

Was causing an issue for pydeep (https://github.com/kbandla/pydeep/issues/7) on Precise.

![image](https://cloud.githubusercontent.com/assets/2341671/5563283/83541e84-8e1b-11e4-9f01-985cf1f8c94d.png)

After update, installation works as expected.

![image](https://cloud.githubusercontent.com/assets/2341671/5563285/ce73cab8-8e1b-11e4-92d2-ef201f35f388.png)