cindex/Python: Move Cursor.is_ methods to CursorKind, and add test.

Also, add CursorKind.get_all_kinds().

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94389 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed