Expose the type-info flags at the public API layer. These flags provide much more informational content to consumers of the LLDB API than the existing TypeClass. Part of the fix for rdar://18517593

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@220322 91177308-0d34-0410-b5e6-96231b3b80d8