NS(Mutable)IndexSet formatter moves from Python to C++

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177217 91177308-0d34-0410-b5e6-96231b3b80d8
C++ formatters for NSTimeZone and for CFBitVector

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177219 91177308-0d34-0410-b5e6-96231b3b80d8