Add NOINLINE pragma.

- add new type of inline info: IDontWantToBeINLINEd

- hopefully get the interactions between IMustNotBeINLINEd (which is
  used by the simplifier to ensure termination when simplifying
  recursive binding groups) and IDontWantToBeINLINEd.

- no need to pass NOINLINE across modules, we just make sure that any
  function marked as NOLINE doesn't get an unfolding in the interface.