QbsProjectManager: Make sub-project files available in the locator.
QbsProjectManager: Make sub-project files available in the locator.

They are currently ignored.

Change-Id: I9a13d37e857d03f988884031bbba81a7f3b95d02
Reviewed-by: Tobias Hunger <012f8d714267bccc9d4766fbeace9f175fcc70c4@digia.com>

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