Fix PR debug/101947

Fix PR debug/101947

This is the recent LTO bootstrap failure with Ada enabled.  The compiler now
generates DW_OP_deref_type for a unit of the Ada front-end, which means that
the offset of base types in the CU must be computed during early DWARF too.

gcc/
	PR debug/101947
	* dwarf2out.c (mark_base_types): New overloaded function.
	(dwarf2out_early_finish): Invoke it on the COMDAT type list as well
	as the compilation unit, and call move_marked_base_types afterward.