Renaming `--iree-llvm-` CPU flags to `--iree-llvmcpu-`.
This matches the existing `--iree-llvmgpu-` flag prefix.
diff --git a/build_tools/bazel/iree_check_test.bzl b/build_tools/bazel/iree_check_test.bzl
index 9400151..2fbe67d 100644
--- a/build_tools/bazel/iree_check_test.bzl
+++ b/build_tools/bazel/iree_check_test.bzl
@@ -118,7 +118,7 @@
     # We haven't implemented this so far because we have been using target_cpu_features so far only
     # for aarch64 targets, for which we use the CMake build. To future people implementing this:
     # target_cpu_features should be a list, and here it should be joined into a comma-separated
-    # string to be passed to --iree-llvm-target-cpu-features
+    # string to be passed to --iree-llvmcpu-target-cpu-features
     if target_cpu_features:
         fail("target_cpu_features must currently be empty")