Add failing PHPAST test case for binary literals

Summary: Ref T4334. We do not currently support these, but should. Support will turn this into a "pass" test case.

Test Plan: Generated expected output with similar file using a hex literal, ran unit tests.

Reviewers: btrahan, Firehed

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T4334

Differential Revision: https://secure.phabricator.com/D8027