Concretize gimple_try_set_catch_is_cleanup
This corresponds to:
[PATCH 64/89] Concretize gimple_try_set_catch_is_cleanup
https://gcc.gnu.org/ml/gcc-patches/2014-04/msg01181.html
from the original 89-patch kit
That earlier patch was approved by Jeff:
> OK after prerequisites have gone in.
in https://gcc.gnu.org/ml/gcc-patches/2014-05/msg00818.html
gcc/
* gimple.h (gimple_try_set_catch_is_cleanup): Require a gimple_try.
* gimplify.c (gimplify_expr): Convert local "try_" from a gimple
to a gimple_try.