Bug#790222: wxwidgets3.0: depends on libwebkitgtk-1.0-0 which is deprecated

[Jeremy Bicha]

Control: tags -1 +fixed-upstream

According to the upstream issue, this is fixed in the 3.0 branch after
the 3.0.3 release.

https://github.com/wxWidgets/wxWidgets/pull/469

Thanks,
Jeremy Bicha