RFR: 8256955: Move includes of events.hpp out of header files

[Stefan Karlsson]

On Thu, 14 Jan 2021 10:11:53 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> I should have asked if you were able to build shenandoah and zero with this change?
>
>> I should have asked if you were able to build shenandoah and zero with this change?
> 
> Yes. Built Shenandoah and Zero locally on fastdebug and release.

Thanks for reviewing!

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PR: https://git.openjdk.java.net/jdk/pull/2059