Fix bug in Toolchain::equals(), removing unecessary toolchain creations
Fix bug in Toolchain::equals(), removing unecessary toolchain creations

This will result in a speedup.

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