Add REQUIRES: asserts to a test that I missed.

Author: gottesmm

test/Concurrency/transfernonsendable_crashers_objc.swift

@@ -1,6 +1,7 @@
 // RUN: %target-swift-frontend -emit-sil -strict-concurrency=complete -enable-experimental-feature RegionBasedIsolation -disable-availability-checking %s -o /dev/null -import-objc-header %S/Inputs/transfernonsendable_crashers_objc.h
 
 // REQUIRES: objc_interop
+// REQUIRES: asserts
 
 import Foundation