Qt4ProjectManager: Omit .pro file warning if that is requested.
Qt4ProjectManager: Omit .pro file warning if that is requested.

Normally, we print a debug message about INSTALLS += var
with var.files being empty.
Don't do this if var.CONFIG contains "no_check_exist".

martyone/sailfish-qtcreator,amyvmiwei/qt-creator,KDAB/KDAB-Creator,dmik/qt-creator-os2,syntheticpp/qt-creator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,colede/qtcreator,amyvmiwei/qt-creator,xianian/qt-creator,xianian/qt-creator,maui-packages/qt-creator,maui-packages/qt-creator,azat/qtcreator,ostash/qt-creator-i18n-uk,colede/qtcreator,Distrotech/qtcreator,syntheticpp/qt-creator,omniacreator/qtcreator,hdweiss/qt-creator-visualizer,danimo/qt-creator,martyone/sailfish-qtcreator,hdweiss/qt-creator-visualizer,kuba1/qtcreator,renatofilho/QtCreator,danimo/qt-creator,malikcjm/qtcreator,bakaiadam/collaborative_qt_creator,pcacjr/qt-creator,renatofilho/QtCreator,kuba1/qtcreator,kuba1/qtcreator,richardmg/qtcreator,bakaiadam/collaborative_qt_creator,duythanhphan/qt-creator,duythanhphan/qt-creator,bakaiadam/collaborative_qt_creator,ostash/qt-creator-i18n-uk,maui-packages/qt-creator,duythanhphan/qt-creator,hdweiss/qt-creator-visualizer,jonnor/qt-creator,renatofilho/QtCreator,KDE/android-qt-creator,kuba1/qtcreator,richardmg/qtcreator,bakaiadam/collaborative_qt_creator,renatofilho/QtCreator,KDAB/KDAB-Creator,maui-packages/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,colede/qtcreator,sandsmark/qtcreator-minimap,farseerri/git_code,martyone/sailfish-qtcreator,KDAB/KDAB-Creator,dmik/qt-creator-os2,yinyunqiao/qtcreator,pcacjr/qt-creator,Distrotech/qtcreator,hdweiss/qt-creator-visualizer,darksylinc/qt-creator,xianian/qt-creator,malikcjm/qtcreator,duythanhphan/qt-creator,AltarBeastiful/qt-creator,pcacjr/qt-creator,omniacreator/qtcreator,darksylinc/qt-creator,syntheticpp/qt-creator,danimo/qt-creator,hdweiss/qt-creator-visualizer,omniacreator/qtcreator,Distrotech/qtcreator,dmik/qt-creator-os2,ostash/qt-creator-i18n-uk,jonnor/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,azat/qtcreator,jonnor/qt-creator,ostash/qt-creator-i18n-uk,malikcjm/qtcreator,danimo/qt-creator,azat/qtcreator,amyvmiwei/qt-creator,richardmg/qtcreator,hdweiss/qt-creator-visualizer,maui-packages/qt-creator,farseerri/git_code,yinyunqiao/qtcreator,duythanhphan/qt-creator,renatofilho/QtCreator,duythanhphan/qt-creator,renatofilho/QtCreator,bakaiadam/collaborative_qt_creator,sandsmark/qtcreator-minimap,ostash/qt-creator-i18n-uk,darksylinc/qt-creator,darksylinc/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,farseerri/git_code,xianian/qt-creator,pcacjr/qt-creator,colede/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,bakaiadam/collaborative_qt_creator,sandsmark/qtcreator-minimap,KDE/android-qt-creator,omniacreator/qtcreator,duythanhphan/qt-creator,KDE/android-qt-creator,amyvmiwei/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,kuba1/qtcreator,azat/qtcreator,pcacjr/qt-creator,sandsmark/qtcreator-minimap,richardmg/qtcreator,richardmg/qtcreator,yinyunqiao/qtcreator,darksylinc/qt-creator,danimo/qt-creator,dmik/qt-creator-os2,Distrotech/qtcreator,xianian/qt-creator,kuba1/qtcreator,syntheticpp/qt-creator,KDE/android-qt-creator,dmik/qt-creator-os2,bakaiadam/collaborative_qt_creator,richardmg/qtcreator,jonnor/qt-creator,darksylinc/qt-creator,dmik/qt-creator-os2,farseerri/git_code,pcacjr/qt-creator,yinyunqiao/qtcreator,syntheticpp/qt-creator,kuba1/qtcreator,richardmg/qtcreator,sandsmark/qtcreator-minimap,KDAB/KDAB-Creator,syntheticpp/qt-creator,yinyunqiao/qtcreator,jonnor/qt-creator,malikcjm/qtcreator,Distrotech/qtcreator,colede/qtcreator,colede/qtcreator,darksylinc/qt-creator,danimo/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,darksylinc/qt-creator,KDAB/KDAB-Creator,malikcjm/qtcreator,colede/qtcreator,amyvmiwei/qt-creator,omniacreator/qtcreator,sandsmark/qtcreator-minimap,martyone/sailfish-qtcreator,Distrotech/qtcreator,malikcjm/qtcreator,ostash/qt-creator-i18n-uk,ostash/qt-creator-i18n-uk,amyvmiwei/qt-creator,KDE/android-qt-creator,danimo/qt-creator,amyvmiwei/qt-creator,azat/qtcreator,danimo/qt-creator,KDE/android-qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,jonnor/qt-creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,omniacreator/qtcreator,maui-packages/qt-creator,malikcjm/qtcreator,dmik/qt-creator-os2,farseerri/git_code,xianian/qt-creator,farseerri/git_code,syntheticpp/qt-creator,KDE/android-qt-creator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,KDE/android-qt-creator,AltarBeastiful/qt-creator,yinyunqiao/qtcreator,yinyunqiao/qtcreator,KDAB/KDAB-Creator,omniacreator/qtcreator,pcacjr/qt-creator,azat/qtcreator