dwarf2out.c (dwarf2out_imported_module_or_decl_1): Allow non-NAMESPACE_DECL IMPORTED_DECL_ASSOCIATED_DECL.

	* dwarf2out.c (dwarf2out_imported_module_or_decl_1): Allow
	non-NAMESPACE_DECL IMPORTED_DECL_ASSOCIATED_DECL.

	* name-lookup.c (cp_emit_debug_info_for_using): Emit USING_STMTs
	instead of calling imported_module_or_decl debug hook if
	building_stmt_tree ().
	* cp-gimplify.c (cp_gimplify_expr): Don't assert the first operand
	is a NAMESPACE_DECL.

From-SVN: r144912