[PATCH, Fortran] fix EQUIVALENCE in MODULE issues

[FX]

> 2015-06-03  Russell Whitesides  <russelldub@gmail.com>
>        Steven G. Kargl  <kargl@gcc.gnu.org>
> 
>    PR fortran/40958
>    PR fortran/60780
>    PR fortran/66377
>    * module.c (load_equiv): Add check for loading duplicate EQUIVALENCEs
>    from different modules.  Eliminate the pruning of unused
>    equivalence-objects
> 
> 
> 2015-06-03  Steven G. Kargl  <kargl@gcc.gnu.org>
> 
>    PR fortran/66377
>    gfortran.dg/equiv_9.f90: New test.


OK. I agree the other test case is not suitable for the testsuite.

FX