Allow .ini and .hdf files to be specified to the HHVM wrapper.

Summary: I like using the HHVM wrapper (hhvm_wrapper.php). I like being able to specify
configuration files to HHVM. Let's marry the two together.

Reviewed By: @ptarjan

Differential Revision: D1514597
Make segfaults during .skipif still run the test

Summary: *sigh* I spent a day trying to figure out why this was ok on my machine. It turned out it WAS segfaulting on my machine just the test runner ignores segfaults during the .skip phase and says all the tests passed. :(

I can't wait to see what fails in testing...

Reviewed By: @JoelMarcey

Differential Revision: D1547980