Debugger: Show at least size for std::__1::unordered_map

Change-Id: I51aaba021fd4893fb521251c9b4b9572c2beef44
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Simplify LLDB communication protocol

Produce proper JSON directly.

Change-Id: I61aaba021fd4893fb521251c9b4b9572c2beef44
Reviewed-by: hjk <hjk121@nokiamail.com>