RFR: 8256414: add optimized build to submit workflow [v2]

[Aleksey Shipilev]

On Mon, 16 Nov 2020 18:53:20 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

>> Hi all,
>> 
>> Could you please review this small and trivial patch which adds `linux-x64-optimized` build to submit workflow so breakages of this build flavor would be easier to spot?
>> 
>> Thanks,
>> -- Igor
>
> Igor Ignatyev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   added --disable-precompiled-headers

Marked as reviewed by shade (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/1233