QmlJS: Fix warnings about duplicate and empty file watchers.
QmlJS: Fix warnings about duplicate and empty file watchers.

Change-Id: Ia2d5f7588f1a5eb4192526e85b2569b4b175dad2
Reviewed-on: http://codereview.qt.nokia.com/3085
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@nokia.com>

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