macho: re-enable creating dSYM bundle

* update number of type abbrevs to match Elf linker
* update `DebugSymbols` to write symbol and string tables
  at the end to match the `MachO` linker
* TODO: update segment vm addresses when growing segments in
  the binary
* TODO: store DWARF relocations in linker's interned arena
27cfbf949aJakub Konka committed on 2/14/2022, 6:24:23 PMparent04f3d93
2 files changedLine totals unavailable