Fix init.d status returning incorrect error code

`/etc/init.d/hhvm status` is always returning incorrect error code

```
$ /etc/init.d/hhvm status; echo $?
[FAIL] hhvm is not running ... failed!
1
```
Merge pull request #39 from eXprojects/patch-1

/etc/init.d/hhvm status returning incorrect error code