re PR fortran/56408 (Fix dependency handling of testsuite/gfortran.dg)

re PR fortran/56408 (Fix dependency handling of testsuite/gfortran.dg)

	PR fortran/56408
	* gfortran.dg/dg.exp (gfortran_test_path, gfortran_aux_module_flags):
	New global vars.
	(dg-compile-aux-modules): New procedure.
	* gfortran.dg/binding_label_tests_10.f03: Remove comment
	and keep-modules.
	* gfortran.dg/binding_label_tests_10_main.f03: Remove comment,
	use dg-compile-aux-modules.
	* gfortran.dg/binding_label_tests_11.f03: Remove comment
	and keep-modules.
	* gfortran.dg/binding_label_tests_11_main.f03: Remove comment,
	use dg-compile-aux-modules.
	* gfortran.dg/binding_label_tests_13.f03: Remove comment
	and keep-modules.
	* gfortran.dg/binding_label_tests_13_main.f03: Remove comment,
	use dg-compile-aux-modules.
	* gfortran.dg/binding_label_tests_26a.f90: Remove comment
	and keep-modules.
	* gfortran.dg/binding_label_tests_26b.f90: Remove comment,
	use dg-compile-aux-modules.
	* gfortran.dg/class_45a.f03: Remove keep-modules.
	* gfortran.dg/class_45b.f03: Use dg-compile-aux-modules
	and cleanup-modules.
	* gfortran.dg/class_4a.f03: Use dg-do link, use
	dg-additional-sources and cleanup-modules, remove keep-modules
	and update comment.
	* gfortran.dg/class_4b.f03: Don't compile anywhere, remove
	keep-modules, adjust comment.
	* gfortran.dg/class_4c.f03: Don't compile anywhere, remove
	dg-additional-sources and cleanup-modules.
	* gfortran.dg/coarray_29_1.f90: Remove keep-modules and
	associated comment.
	* gfortran.dg/coarray_29_2.f90: Use dg-compile-aux-modules,
	remove comment.
	* gfortran.dg/test_common_binding_labels_2.f03: Remove keep-modules.
	* gfortran.dg/test_common_binding_labels_2_main.f03: Remove comment,
	use dg-compile-aux-modules.
	* gfortran.dg/test_common_binding_labels_3.f03: Remove keep-modules.
	* gfortran.dg/test_common_binding_labels_3_main.f03: Remove comment,
	use dg-compile-aux-modules.
	* gfortran.dg/whole_file_28.f90: Remove comment and keep-modules.
	* gfortran.dg/whole_file_29.f90: Remove comment, use
	dg-compile-aux-modules.
	* gfortran.dg/whole_file_30.f90: Remove comment and keep-modules.
	* gfortran.dg/whole_file_31.f90: Remove comment, use
	dg-compile-aux-modules.

From-SVN: r215275