minor version update of phantomjs from 1.8.0 to 1.8.1

1.8.0 does not provide a package for linux-i686, but 1.8.1 does

See 
https://code.google.com/p/phantomjs/downloads/list?can=4&q=&colspec=Filename+Summary+Uploaded+ReleaseDate+Size+DownloadCount