Import dependencies to make unit tests friendlier to running independently

The HHVM test runner runs the unit tests in parallel. Currently some tests
fail because not all the dependencies are properly included.

This is similar to 659efe1a88e8cc553bfa965aec2069bee897d4b4

Signed-off-by: Jeff Chan <jefftchan@gmail.com>
Merge pull request #1037 from jeffchan/fix-tests

Import dependencies to make unit tests friendlier to running independently