debugger: take actual breakpoints into account for source locations

Change-Id: I5cf2982812456249fca2f233514cb90bb8d3bfe0
Reviewed-on: http://codereview.qt-project.org/5799
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/breakhandler.h

@@ -79,6 +79,7 @@ public:
     BreakpointModelIds engineBreakpointIds(DebuggerEngine *engine) const;
     BreakpointModelIds unclaimedBreakpointIds() const;
     int size() const { return m_storage.size(); }
+    QStringList engineBreakpointPaths(DebuggerEngine *engine) const;
 
     // Find a breakpoint matching approximately the data in needle.
     BreakpointModelId findSimilarBreakpoint(const BreakpointResponse &needle) const;