widertiger: mark as broken

It is not maintained, and not used since 480b289f5bcd19782408aad5f781af9b74ee66bb.

pkgs/development/libraries/wiredtiger/default.nix

···
     license = licenses.gpl2;
     platforms = intersectLists platforms.unix platforms.x86_64;
     maintainers = with maintainers; [ wkennington ];
+    broken = true; # Broken by f689a6d1c6796c4a4f116ffec6c4624379e04bc9.
   };
 }