[LV] Add missing REQUIRES: asserts to new test from #188126.

Test checks debug output, and requires asserts.

Author: fhahn

llvm/test/Transforms/LoopVectorize/AArch64/binop-costs.ll

@@ -1,6 +1,8 @@
 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --filter "[Cc]ost.*udiv"
 ; RUN: opt -passes=loop-vectorize -debug-only=loop-vectorize  %s -S -o - 2>&1 | FileCheck %s
 
+; REQUIRES: asserts
+
 target triple = "arm64-apple-macosx"
 
 define void @udiv_rhs_opt_cost(ptr %dst) #0 {