message: Fix lit test for macOS on ARM: x86 is not required to be enabled
diff: // RUN: %{ispc} %s --arch=aarch64 --target-os=macos --target=neon-i32x4 --emit-asm -o - | FileCheck %s --check-prefix=CHECK_ARM
  -// RUN: not %{ispc} %s --arch=x86 --target-os=macos --target=avx2-i32x8 --nowrap -o %t.o 2>&1 | FileCheck %s --check-prefix=CHECK_ERROR
  // RUN: not %{ispc} %s --arch=arm --target-os=macos --target=neon-i32x4 --nowrap -o %t.o 2>&1 | FileCheck %s --check-prefix=CHECK_ERROR
  // REQUIRES: MACOS_ARM_ENABLED
  