debugger: fix QSet dumper
debugger: fix QSet dumper

Task-number: QTCREATORBUG-6547
Change-Id: I567f6970ad2d89d862ed86fbaa69e7eecacb9738
Reviewed-by: hjk <6fac1c92f5b9c7890a04d7f8a9d8912d16355eac@ovi.com>

danimo/qt-creator,syntheticpp/qt-creator,duythanhphan/qt-creator,duythanhphan/qt-creator,omniacreator/qtcreator,AltarBeastiful/qt-creator,kuba1/qtcreator,duythanhphan/qt-creator,colede/qtcreator,amyvmiwei/qt-creator,duythanhphan/qt-creator,malikcjm/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,KDE/android-qt-creator,omniacreator/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,danimo/qt-creator,Distrotech/qtcreator,xianian/qt-creator,darksylinc/qt-creator,colede/qtcreator,martyone/sailfish-qtcreator,syntheticpp/qt-creator,KDAB/KDAB-Creator,KDE/android-qt-creator,syntheticpp/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,duythanhphan/qt-creator,jonnor/qt-creator,KDE/android-qt-creator,ostash/qt-creator-i18n-uk,darksylinc/qt-creator,martyone/sailfish-qtcreator,KDAB/KDAB-Creator,azat/qtcreator,kuba1/qtcreator,farseerri/git_code,hdweiss/qt-creator-visualizer,danimo/qt-creator,martyone/sailfish-qtcreator,KDE/android-qt-creator,kuba1/qtcreator,richardmg/qtcreator,hdweiss/qt-creator-visualizer,Distrotech/qtcreator,hdweiss/qt-creator-visualizer,colede/qtcreator,jonnor/qt-creator,AltarBeastiful/qt-creator,KDAB/KDAB-Creator,maui-packages/qt-creator,bakaiadam/collaborative_qt_creator,farseerri/git_code,omniacreator/qtcreator,amyvmiwei/qt-creator,KDAB/KDAB-Creator,darksylinc/qt-creator,danimo/qt-creator,Distrotech/qtcreator,kuba1/qtcreator,Distrotech/qtcreator,syntheticpp/qt-creator,omniacreator/qtcreator,syntheticpp/qt-creator,Distrotech/qtcreator,xianian/qt-creator,bakaiadam/collaborative_qt_creator,martyone/sailfish-qtcreator,malikcjm/qtcreator,xianian/qt-creator,jonnor/qt-creator,jonnor/qt-creator,omniacreator/qtcreator,richardmg/qtcreator,hdweiss/qt-creator-visualizer,bakaiadam/collaborative_qt_creator,ostash/qt-creator-i18n-uk,amyvmiwei/qt-creator,danimo/qt-creator,ostash/qt-creator-i18n-uk,darksylinc/qt-creator,azat/qtcreator,KDAB/KDAB-Creator,xianian/qt-creator,xianian/qt-creator,ostash/qt-creator-i18n-uk,darksylinc/qt-creator,bakaiadam/collaborative_qt_creator,azat/qtcreator,KDE/android-qt-creator,ostash/qt-creator-i18n-uk,maui-packages/qt-creator,richardmg/qtcreator,bakaiadam/collaborative_qt_creator,martyone/sailfish-qtcreator,malikcjm/qtcreator,AltarBeastiful/qt-creator,richardmg/qtcreator,syntheticpp/qt-creator,azat/qtcreator,danimo/qt-creator,ostash/qt-creator-i18n-uk,amyvmiwei/qt-creator,kuba1/qtcreator,richardmg/qtcreator,hdweiss/qt-creator-visualizer,danimo/qt-creator,farseerri/git_code,malikcjm/qtcreator,maui-packages/qt-creator,malikcjm/qtcreator,xianian/qt-creator,richardmg/qtcreator,kuba1/qtcreator,AltarBeastiful/qt-creator,Distrotech/qtcreator,colede/qtcreator,maui-packages/qt-creator,malikcjm/qtcreator,azat/qtcreator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,maui-packages/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,amyvmiwei/qt-creator,KDE/android-qt-creator,farseerri/git_code,darksylinc/qt-creator,malikcjm/qtcreator,azat/qtcreator,KDE/android-qt-creator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,colede/qtcreator,omniacreator/qtcreator,jonnor/qt-creator,omniacreator/qtcreator,AltarBeastiful/qt-creator,richardmg/qtcreator,farseerri/git_code,maui-packages/qt-creator,bakaiadam/collaborative_qt_creator,hdweiss/qt-creator-visualizer,amyvmiwei/qt-creator,Distrotech/qtcreator,syntheticpp/qt-creator,kuba1/qtcreator,darksylinc/qt-creator,ostash/qt-creator-i18n-uk,bakaiadam/collaborative_qt_creator,duythanhphan/qt-creator,danimo/qt-creator,farseerri/git_code,farseerri/git_code,KDAB/KDAB-Creator,maui-packages/qt-creator,xianian/qt-creator,kuba1/qtcreator,duythanhphan/qt-creator,jonnor/qt-creator,colede/qtcreator,darksylinc/qt-creator,colede/qtcreator,KDE/android-qt-creator