Fix asm-misplaced-option on ARM/AArch64

[mmatyas]

This fixes #33737. Of course, since we don't run make check for ARM cross builds, you probably won't notice it.

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[alexcrichton]

Hm I believe the intention of this test was to only test x86/x86_64 because the assembly is unlikely to work on other platforms, it's just a relic of our test harness that we require the same messages on all architectures.

Could this test be updated with something like // ignore-aarch64 instead?

[mmatyas]

If this test only works on x86/64, wouldn't that mean adding // ignore- for every platform? Isn't there something like // only-on-?

I mean, I see there's a #[cfg(any(target_arch = ...))], but it doesn't seem to work well with #[rustc_error]. I think this is the only test that uses rustc_error with cfg, by the way.

[alexcrichton]

Yeah unfortunately we don't have // only yet (although I think there's an issue for it), but for now it should suffice to just have a few // ignore directives, the test suite largely isn't running on multiple architectures.

[mmatyas]

Ok, updated.

[alexcrichton]

@bors: r+ ba8d46e rollup

Thanks!