RFR: 8264449: Enable reproducible builds with SOURCE_DATE_EPOCH [v3]

[John Neffenger]

On Fri, 16 Apr 2021 19:05:34 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> John Neffenger has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Include WebKit shared library for Windows
>>   
>>   Enable reproducible builds of the native WebKit shared library for
>>   Windows (jfxwebkit.dll) when SOURCE_DATE_EPOCH is defined.
>
> Note that this PR is dependent on PR #422 .
> 
> @jgneff  As an alternative, you could close that PR (since all of the changes from that one are currently included here), and list both issues in this PR with Skara's `/issue add ...` command. It's up to you.

@kevinrushforth I'll take the opportunity provided by this *merge-conflict* to simplify as you suggested.

I'll close pull request #422, list both issues in this pull request, add Bernhard as a contributor, and add a commit that makes the `all` task reproducible. That will consolidate what would have been three pull requests into one and will leave only the build path problem for a follow-up request (fix number 4 in my first comment).

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PR: https://git.openjdk.java.net/jfx/pull/446