Debugger: Handle _Rb_tree_const_iterator, too

Change-Id: I01baa597976ec5f6e84c8c52aff6e617082b1a28
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Continue LLDB event loop after exceptions

Change-Id: I4d3547396384fe5b421c4b601b52476a23cdfa89
Reviewed-by: hjk <hjk121@nokiamail.com>