[LV] Fix missing REQUIRES: asserts in test (#151737)

e7200c7 ([LV] Pre-commit test for #151664) forgot to require asserts in
the test, and stripped a CHECK line in error. Fix this.

Author: artagnon

llvm/test/Transforms/LoopVectorize/AArch64/pr151664-cost-hoisted-vector-scalable.ll

@@ -1,12 +1,13 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "^scalar.ph" --version 5
+; REQUIRES: asserts
 ; RUN: opt -passes=loop-vectorize -mtriple=aarch64 -mattr=+sve -S \
 ; RUN:   -debug-only=loop-vectorize %s 2>&1 | FileCheck %s
 
 ; FIXME: Hoisted vector code should be costed with scalable cost.
 ; In this example, `<vscale x 4 x float> @llvm.minimumnum` has an invalid cost,
-; and hence should not be produced by LoopVectorize. Unfortunately, what is
-; actually costed is `<4 x float> @llvm.minimumnum`.
+; and hence should not be produced by LoopVectorize.
 
+; CHECK: LV: Found an estimated cost of Invalid for VF vscale x 4 For instruction:   %res = tail call float @llvm.minimumnum.f32(float %arg, float 0.000000e+00)
 define void @cost_hoisted_vector_code(ptr %p, float %arg) {
 ; CHECK-LABEL: define void @cost_hoisted_vector_code(
 ; CHECK-SAME: ptr [[P:%.*]], float [[ARG:%.*]]) #[[ATTR0:[0-9]+]] {