[Bug fortran/32365] Better error message for specification statement in executable section

[albert at tugraz dot at]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32365

--- Comment #6 from Christopher Albert <albert at tugraz dot at> ---
(In reply to Jerry DeLisle from comment #5)
> We do audit the list of PRs when we can. I will have to try your fix here
> and see how it plays. Fixing any bug is good.

Patch still needs changes in some test files where output has changed now. I
will upload a new patch then. Before, it's probably more important to get
consensus, if this error message style is the right one.