Do some cleanup of DumpValueObjectOptions. The whole concept of raw printing was split between feature-specific flags, and an m_be_raw flag, which then drove some other changes in printing behavior. Clean that up, so that each functionality has its own flag .. oh, and make the bools all go in a bitfield since I may want to add more of those over time

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@222548 91177308-0d34-0410-b5e6-96231b3b80d8