* tree.def: Add NAMESPACE_DECL.
	* dwarfout.c (type_ok_for_scope): Ignore NAMESPACE_DECLs for now.
	* dwarf2out.c (push_decl_scope): Likewise.
	(scope_die_for): Likewise.
	* tree.c (decl_function_context): Use TREE_CODE_CLASS to determine
	how to get next context level.
	* cp-tree.def: Remove NAMESPACE_DECL.
	* cp/Makefile.in: Add .SUFFIXES.

From-SVN: r19539