Debugger: Raise messagebox when cdb can't be started.
Debugger: Raise messagebox when cdb can't be started.

Task-number: QTCREATORBUG-10180

Change-Id: Iaf672c79a95c37fba2f5243db9564305de8e76dc
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@digia.com>

darksylinc/qt-creator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,Distrotech/qtcreator,maui-packages/qt-creator,kuba1/qtcreator,Distrotech/qtcreator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,kuba1/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,omniacreator/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,darksylinc/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,maui-packages/qt-creator,AltarBeastiful/qt-creator,omniacreator/qtcreator,maui-packages/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,maui-packages/qt-creator,farseerri/git_code,colede/qtcreator,colede/qtcreator,omniacreator/qtcreator,danimo/qt-creator,maui-packages/qt-creator,maui-packages/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,farseerri/git_code,xianian/qt-creator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,kuba1/qtcreator,xianian/qt-creator,kuba1/qtcreator,darksylinc/qt-creator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,Distrotech/qtcreator,farseerri/git_code,danimo/qt-creator,xianian/qt-creator,omniacreator/qtcreator,danimo/qt-creator,AltarBeastiful/qt-creator,omniacreator/qtcreator,xianian/qt-creator,maui-packages/qt-creator,richardmg/qtcreator,kuba1/qtcreator,danimo/qt-creator,Distrotech/qtcreator,richardmg/qtcreator,darksylinc/qt-creator,richardmg/qtcreator,darksylinc/qt-creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,richardmg/qtcreator,amyvmiwei/qt-creator,danimo/qt-creator,darksylinc/qt-creator,Distrotech/qtcreator,AltarBeastiful/qt-creator,colede/qtcreator,colede/qtcreator,omniacreator/qtcreator,richardmg/qtcreator,danimo/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,farseerri/git_code,omniacreator/qtcreator,xianian/qt-creator,xianian/qt-creator,colede/qtcreator,colede/qtcreator,farseerri/git_code,xianian/qt-creator,colede/qtcreator,martyone/sailfish-qtcreator,darksylinc/qt-creator,kuba1/qtcreator,richardmg/qtcreator,kuba1/qtcreator,AltarBeastiful/qt-creator,richardmg/qtcreator,xianian/qt-creator