d: Merge upstream dmd 48d704f08

d: Merge upstream dmd 48d704f08

Updates the Array interface in dmd/root/array.h to use a DArray<TYPE>
internally.  Splits out BitArray into a separate header.

Reviewed-on: https://github.com/dlang/dmd/pull/11219

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 48d704f08.
	* d-attribs.cc (build_attributes): Use new field name.
	* d-builtins.cc (build_frontend_type): Likewise.
	(maybe_set_builtin_1): Likewise.
	(d_maybe_set_builtin): Likewise.
	* d-codegen.cc (build_interface_binfo): Likewise.
	(identity_compare_p): Likewise.
	(lower_struct_comparison): Likewise.
	(build_struct_comparison): Likewise.
	(d_build_call): Likewise.
	(build_frame_type): Likewise.
	(build_closure): Likewise.
	* d-compiler.cc (Compiler::paintAsType): Likewise.
	(Compiler::loadModule): Likewise.
	* d-incpath.cc (add_globalpaths): Likewise.
	(add_filepaths): Likewise.
	(add_import_paths): Likewise.
	* d-lang.cc (deps_write): Likewise.
	(d_parse_file): Likewise.
	* decl.cc (gcc_attribute_p): Likewise.
	(base_vtable_offset): Likewise.
	(get_vtable_decl): Likewise.
	(build_class_instance): Likewise.
	* expr.cc (class ExprVisitor): Likewise.
	* modules.cc (layout_moduleinfo_fields): Likewise.
	(layout_moduleinfo): Likewise.
	(build_module_tree): Likewise.
	* toir.cc (class IRVisitor): Likewise.
	* typeinfo.cc (class TypeInfoVisitor): Likewise.
	(layout_classinfo_interfaces): Likewise.
	* types.cc (layout_aggregate_members): Likewise.
	(layout_aggregate_type): Likewise.