Add an `is raw` onto the THROW helper
Add an `is raw` onto the THROW helper

It's always called from within another control exception sub, which can
do the correct thing with the return value. Avoids some decont logic on
each use of `THROW`; given control exceptions don't really return in the
common case, this will only really help much with things like `take`,
although it does make the code smaller, and - thanks to `THROW` being a
juicy inline target - will make everything it's inlined into smaller
too.

labster/rakudo,tbrowder/rakudo,tbrowder/rakudo,softmoth/rakudo,Gnouc/rakudo,labster/rakudo,tony-o/rakudo,labster/rakudo,labster/rakudo,rakudo/rakudo,nbrown/rakudo,salortiz/rakudo,nbrown/rakudo,labster/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,tony-o/rakudo,tony-o/rakudo,rakudo/rakudo,salortiz/rakudo,softmoth/rakudo,softmoth/rakudo,tbrowder/rakudo,rakudo/rakudo,salortiz/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,nbrown/rakudo,softmoth/rakudo,nbrown/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,MasterDuke17/rakudo,salortiz/rakudo,Gnouc/rakudo,Gnouc/rakudo,softmoth/rakudo,MasterDuke17/rakudo,nbrown/rakudo,MasterDuke17/rakudo,nbrown/rakudo,Gnouc/rakudo,Gnouc/rakudo,tony-o/rakudo,salortiz/rakudo,rakudo/rakudo,salortiz/rakudo,tony-o/rakudo,rakudo/rakudo,rakudo/rakudo