<rdar://problem/12239827>

Providing a data formatter for libc++ std::wstring
In the process, refactoring the std::string data formatter to be written in C++ so that commonalities between the two can be exploited
Also, providing a new API on the ValueObject to navigate a hierarchy by index-path
Lastly, an appropriate test case is included



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@172282 91177308-0d34-0410-b5e6-96231b3b80d8
<rdar://problem/12239827>

Making a summary for std::wstring as provided by libstdc++ along with a relevant test case



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@172286 91177308-0d34-0410-b5e6-96231b3b80d8
Don't always strip the first extension from the module basename when looking for python scripts. Now we take a name like "a.b.c" and look for scripts that are "a_b_c.py", "a_b.py" and "a.py" inside the dSYM.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@172291 91177308-0d34-0410-b5e6-96231b3b80d8