[Bug 47763] Update build guide for Fedora 30

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47763

--- Comment #3 from Tukusej’s Sirs  ---
(In reply to Rosanne DiMesio from comment #2)
> Not invalid; that page does need updating.
>
> (In reply to Ken Sharp from comment #1)
> > > (2) I have no editing rights at WineHQ Wiki.
> >
> > Create an account. It is a Wiki.
>
> Guess you've been gone for awhile. Merely creating a wiki account no longer
> gives editing rights. They have to be requested.

True about the rights. :)

So, is there anything I can do? :)