[patch testsuite]: Deactivate some test in gfortran.dg not supported by w64

[FX]

> 2008-04-30  Kai Tietz  <kai.tietz@onevision.com>
> 	* gfortran.dg/chmod_1.f90: Disable for *-*-mingw*.
> 	* gfortran.dg/chmod_2.f90: Likewise.
> 	* gfortran.dg/chmod_3.f90: Likewise.
> 	* gfortran.dg/open_errors.f90: Likewise.


No patch attached, but it's still OK to commit :)

FX

-- 
François-Xavier Coudert
http://www.homepages.ucl.ac.uk/~uccafco/