darwin: also run dsymutil for DWARF 4

compiler/systems/t_darwin.pas

@@ -553,7 +553,7 @@ implementation
       { create dsym file? }
       extdbgbinstr:='';
       extdbgcmdstr:='';
-      if (target_dbg.id in [dbg_dwarf2,dbg_dwarf3]) and
+      if (target_dbg.id in [dbg_dwarf2,dbg_dwarf3,dbg_dwarf4]) and
          (cs_link_separate_dbg_file in current_settings.globalswitches) then
         begin
           extdbgbinstr:=FindUtil(utilsprefix+'dsymutil');