Fixed an exotic linker issue on gcc 4.1.2

Reviewed-by: dt

src/plugins/debugger/dumper.pro

@@ -8,6 +8,8 @@ include(../../qworkbenchlibrary.pri)
 linux-* {
 CONFIG -= release
 CONFIG += debug
+# The following line works around a linker issue with gcc 4.1.2
+QMAKE_CXXFLAGS *= -O2
 }
 
 SOURCES += ../../../share/qtcreator/gdbmacros/gdbmacros.cpp