debugger: correct comment in dumper.py

Change-Id: Ic1d33180515ad79c4233b013ec7d3530674d5117
Reviewed-on: http://codereview.qt.nokia.com/651
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

share/qtcreator/gdbmacros/dumper.py

@@ -443,7 +443,7 @@ def listOfLocals(varList):
         warn("FRAME NOT ACCESSIBLE FOR UNKNOWN REASONS")
         return []
 
-    # gdb-6.8-symbianelf fails here
+    # New in 7.2
     hasBlock = 'block' in __builtin__.dir(frame)
 
     items = []