Adapt README to new windeployqt usage.

Task-number: QTBUG-41670
Change-Id: Iff82dbbad2248eae8ec9af12e0d92f3e6e592d6c
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>

README

@@ -170,7 +170,7 @@ http://qt-project.org/wiki/Building_Qt_5_from_Git .
        able to find all dependent Qt-libraries and plugins when being launched by the
        system. The easiest way to provide them for Qt 5 is to run the tool windeployqt:
 
-       windeployqt -svg -xml -designercomponents -script -concurrent -network -quick -quickwidgets -test -sql -printsupport -qthelp -qmldir share\qtcreator -qmldir src\plugins\qmlprofiler bin\qtcreator.exe
+       windeployqt -qmldir share\qtcreator -qmldir src\plugins\qmlprofiler bin\qtcreator.exe lib\qtcreator lib\qtcreator\plugins
 
 Note that unlike on Unix, you cannot overwrite executables that are running.
 Thus, if you want to work on Qt Creator using Qt Creator, you need a