[SYCL][NativeCPU] Update lit test. (intel#16558)

Since merging in upstream LLVM changes, we now see a splat.

Author: hvdijk

sycl/test/check_device_code/native_cpu/vectorization.cpp

@@ -18,9 +18,9 @@ int main() {
   sycl::range<1> r(1);
   deviceQueue.submit([&](sycl::handler &h) {
     h.parallel_for<Test1>(r, [=](sycl::id<1> id) { acc[id[0]] = 42; });
-    // CHECK-DEFAULT: store <8 x i32> <i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42>
-    // CHECK-16: store <16 x i32> <i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42, i32 42>
-    // CHECK-4: store <4 x i32> <i32 42, i32 42, i32 42, i32 42>
+    // CHECK-DEFAULT: store <8 x i32> splat (i32 42)
+    // CHECK-16: store <16 x i32> splat (i32 42)
+    // CHECK-4: store <4 x i32> splat (i32 42)
     // CHECK-O0: store i32 42
     // CHECK-O0-NOT: store <{{.*}}>
     // CHECK-DISABLE: store i32 42