Restrict Lint's complaints about recursive INLINEs somewhat
Restrict Lint's complaints about recursive INLINEs somewhat

This patch makes the Lint warning about recursive functions with an
INLINE only apply if there is a stable unfolding.  If not (e.g. some
other pass took it out) we don't need to worry.  Not a big deal.

shlevy/ghc,sdiehl/ghc,ezyang/ghc,ezyang/ghc,shlevy/ghc,ezyang/ghc,sdiehl/ghc,shlevy/ghc,ezyang/ghc,shlevy/ghc,shlevy/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,ezyang/ghc,sdiehl/ghc,shlevy/ghc,sdiehl/ghc,shlevy/ghc,ezyang/ghc,ezyang/ghc