d: Fix forward referenced enums missing type names in debug info [PR118309]

d: Fix forward referenced enums missing type names in debug info [PR118309]

Calling `rest_of_type_compilation' as the D types were built meant that
debug info was being emitted before all forward references were
resolved, resulting in DW_AT_name's to be missing.

Instead, defer outputting type debug information until all modules have
been parsed and generated in `d_finish_compilation'.

	PR d/118309

gcc/d/ChangeLog:

	* modules.cc: Include debug.h
	(d_finish_compilation): Call debug_hooks->type_decl on all TYPE_DECLs.
	* types.cc: Remove toplev.h include.
	(finish_aggregate_type): Don't call rest_of_type_compilation or
	rest_of_decl_compilation on type.
	(TypeVisitor::visit (TypeEnum *)): Likewise.

gcc/testsuite/ChangeLog:

	* gdc.dg/debug/dwarf2/pr118309.d: New test.