Debugger/MinGW: Set environment correctly.
Debugger/MinGW: Set environment correctly.

Extend the environment instead of clobbering
it with the Python setup.
Reviewed-by: dt

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