community/chromium: various fixes
Disable dns config service, which depends on __res_stat and does not work at all. fixes: #15660 (closed)
Fix build with libxml2 2.12. ref: https://invent.kde.org/qt/qt/qtwebengine-chromium/-/commit/0ac7411195581d33bb07ead3ff2abc0610f96ff8
Build with bundled ffmpeg. fixes #15585 (closed)