[lldb] Clean up bit tagging code with some constants and a new accessor function.
[lldb] Remove useless format call when getting string data.
[lldb] Walk objects and show all slots.
[lldb] Don't show children for an <empty-list>
[lldb] Improve display of boolean and byte-strings.
[lldb] Improve display of <symbol>.
Merge pull request #797 from waywardmonkeys/lldb-tools

Lldb tools