qt5.qtwebkit: set myself as a maintainer

pkgs/development/libraries/qt-5/5.6/qtwebkit/default.nix

···
         };
     in optionals flashplayerFix [ dlopen-webkit-nsplugin dlopen-webkit-gtk ]
     ++ [ dlopen-webkit-udev ];
+  meta.maintainers = with stdenv.lib.maintainers; [ abbradar ];
 }

pkgs/development/libraries/qt-5/5.7/qtwebkit/default.nix

···
         };
     in optionals flashplayerFix [ dlopen-webkit-nsplugin dlopen-webkit-gtk ]
     ++ [ dlopen-webkit-udev ];
+  meta.maintainers = with stdenv.lib.maintainers; [ abbradar ];
 }