AST: introduce the opposite options for ABIBreakingToAdd and others

Adding ABIBreakingToAdd and other options for decl attribute kind isn't
sufficient because future attributes may forget to add the ABI/API impact bits.
This patch introduces the opposite options of these breaking bits (ABIStableToAdd, etc)
, and adds several static assertions to ensure one of the opposite ABI/API impact
flags is explicitly specified.

Author: nkcsgexi