Debugger: Remove workaround for GDB < 7.2 missing frame.block
Debugger: Remove workaround for GDB < 7.2 missing frame.block

This practically means that the >= 7.2 requirement is now a hard
requirement.

Change-Id: I6c3abbc625443ded182d2da101e04d96e3bed26d
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@digia.com>

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