Add missing DISPATCH_COCOA_COMPAT preprocessor symbol.

_dispatch_runloop_queue_xref_dispose is declared in src/queue_internal.h
but the declaration is hidden behind DISPATCH_COCOA_COMPAT. This means
the call to _dispatch_runloop_queue_xref_dispose must also be put behind
this preprocessor symbol.

Signed-off-by: Rokhini Prabhu <rokhinip@apple.com>

Author: 3405691582

src/object.c

@@ -226,10 +226,11 @@ _dispatch_xref_dispose(dispatch_object_t dou)
 			_dispatch_mach_xref_dispose(dou._dm);
 			break;
 #endif
+#if DISPATCH_COCOA_COMPAT
 		case DISPATCH_QUEUE_RUNLOOP_TYPE:
 			_dispatch_runloop_queue_xref_dispose(dou._dl);
 			break;
-		}
+#endif
 	}
 	return _dispatch_release_tailcall(dou._os_obj);
 }