[webkit-qt] Add "--css3-text-decoration" parameter to build bots

[Bruno Abinader]

Hi all,

After changes from http://trac.webkit.org/changeset/125716 all further
CSS3 text decoration will come disabled by default. This is not
helpful when you want to check EWS, for example. Said this, is it
possible to enable this build parameter on Qt build bots (which is the
platform I'm testing the most this implementation) for checking?

Best regards,

-- 
Bruno de Oliveira Abinader