Draft: DWARF: add DW_TAG_property

Martinrequested to merge
martin_frb/fpc-src:mfr/dwarf-6-properties into main

DWARF-6 introduces official tags for properties.

This MR implements them, and FpDebug already can read them. GDB (12 and 17, on Win64) happily ignores them.

Marked as draft:

  • Since GDB benefits from the old "converted property to fields", this should be kept. To do that a new command line option to fpc is needed. E.g.: -godwarfFpDebug or -godwarfFpDbg
  • other comments, feedback?

Merge request reports