RFR: 8273512: Fix the copyright header of x86 macroAssembler files

[David Holmes]

On Wed, 8 Sep 2021 20:09:10 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

> Fix the copyright header of x86 macroAssembler files to match others.

Hi Sandhya,

Hotspot files do not have the "Classpath exception".

Thanks,
David

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Changes requested by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5424