GCC: Fix parsing of gcc 4.6 output
GCC: Fix parsing of gcc 4.6 output

 * Add unit test.
 * Tweak regexp to make the new unit test pass.

Task-number: QTCREATORBUG-5634
Change-Id: I31da8e3ac7fb1c3c5129b4fed6a228d0a73a09ea
Reviewed-on: http://codereview.qt.nokia.com/2395
Reviewed-by: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Tobias Hunger <012f8d714267bccc9d4766fbeace9f175fcc70c4@nokia.com>

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