[ patch, testsuite, fortran] Replace "call abort" by "stop n"

[Thomas Koenig]

Am 16.02.2018 um 09:11 schrieb Janne Blomqvist:
> as a result of this, you should be able to remove the vast majority of
> -fall-intrinsics extra options. Please do that as well.

Done, in r257782.

> I actually liked the usage of "call abort" in testcases, as a failing
> testcase provided a backtrace with line number information and a core
> dump. With this change, one now has to check on which line the
> testcase failed, set a breakpoint there and run it again in the
> debugger. Oh well, I guess that convenience has to be sacrificed on
> the altar of standards conformance.

Well, we get the output "STOP 1" for a STOP 1 statement.
Should not be too hard to find in the source.

Regards

	Thomas