direct_io_1.f90, [...]: Delete temporary files from testcases.

	* gfortran.dg/direct_io_1.f90, gfortran.dg/iostat_2.f90,
	gfortran.dg/open_new.f90, gfortran.dg/open_readonly_1.f90,
	gfortran.dg/pr16935.f90, gfortran.dg/pr20954.f,
	gfortran.dg/read_many_1.f, gfortran.dg/unf_io_convert_2.f90,
	gfortran.fortran-torture/execute/direct_io.f90,
	gfortran.fortran-torture/execute/inquire_2.f90,
	gfortran.fortran-torture/execute/inquire_4.f90,
	gfortran.fortran-torture/execute/list_read_1.f90,
	gfortran.fortran-torture/execute/open_replace.f90,
	gfortran.fortran-torture/execute/slash_edit.f90,
	gfortran.fortran-torture/execute/unopened_unit_1.f90: Delete
	temporary files from testcases.

From-SVN: r112201