Update PhantomJS 1.9.7 to 1.9.8

PhantomJS 1.9.8 includes the following changes:

* Change default SSL protocol to TLSv1 to address POODLE.
  To use the old default protocol of SSLv3 which is vulnerable to POODLE
  add the --ssl-protocol=SSLv3 flag. Reference: http://poodlebleed.com/
* Fixed building on OS X 10.10 Yosemite
* Backported crash fix when exit