gnu: qt: Update to 5.11.1.
* gnu/packages/qt.scm (qtbase, qtsvg, qtimageformats, qtx11extras,
qtxmlpatterns, qtdeclarative, qtconnectivity, qtwebsockets, qtsensors,
qtmultimedia, qtwayland, qtserialport, qtserialbus, qtwebchannel,
qtwebglplugin, qtwebview, qtlocation, qttools, qtscript,
qtquickcontrols, qtquickcontrols2, qtgrapgicaleffects, qtgamepad,
qtscxml, qtpurchasing, qtcanvas3d, qtcharts, qtdatavis3d, qtnetworkauth,
qtremoteobjects, qtspeech): Update to 5.11.1.
(qtwebglplugin)[arguments]: Add custom phase to disable network tests.
[inputs]: Add qtdeclarative.
(qtremoteobjects)[arguments]: Add another test to the skip list.
(qtspeech)[arguments]: Disable tests.
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