[Bug fortran/94737] BIND(C) names are not always treated as case sensitive.

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94737

--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
So, test case committed.

Thanks for the bug report!  Even though it turned out to be invalid,
it still ended up making the compiler better.