more new test failures on Darwin

[François-Xavier Coudert]

> ...so it looks like the same libraries are used. Could someone manually compile the chmod_1.f90
> test under Linux and verify that it can be run with 'sudo ./chmod_1.exe'?

chmod creates a file with OPEN and then tries to see if it can access
it. I suspect that using a sudo changes the effective UID but not the
real UID, and one of the tests somehow fails. Can you see which abort
call is trigered?

FX