Run quick tests in travis

The slow ones seems to abort halfway through, and a few zend ones aren't passing right now. :(
Update systemlib from source files.

Failed to generated this during the last push.
Merge branch 'master' of https://github.com/facebook/hiphop-php
Add zend tests to travis

With the updated systemlib they should pass
Run all tests together

That way you don't depend on the previous suite passing
only use 8 threads

Travis was running out of memory. I also use 8 for compiling.
use --arg

Drew hasn't fixed argument parsing yet
single-thread the tests

I'm worried there is memory pressures. Better safe than sorry for now.
use 2 threads

1 took way too long...