RFR: 8287894: Use fixed timestamp as an alternative of __DATE__ macro in jdk.jdi to make Windows build reproducible

[Magnus Ihse Bursie]

On Tue, 7 Jun 2022 19:57:48 GMT, Alexey Pavlyutkin <duke at openjdk.java.net> wrote:

> Hi!
> 
> Here is a fix to jdk.jdi that fixes reproducible build for Windows. The idea of the fix is to re-use value of --with-hotspot-build-time option to generate deterministic timestamp exactly like it's done to hotspot component.
> 
> Verification (Windows-10/MSVS-2019): ```bash ./configure --with-boot-jdk=c:/work/boot-jdk/jdk-18 --with-debug-level=fastdebug --with-hotspot-build-time="6/7/2022 2:35pm" --with-extra-cflags="/experimental:deterministic" --with-extra-cxxflags="/experimental:deterministic"```
> 
> Regression (Windows-10/MSVS-2019): ```bash ./configure --with-boot-jdk=c:/work/boot-jdk/jdk-18 --with-debug-level=fastdebug```

Looks good. Thanks for fixing this!

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Marked as reviewed by ihse (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/9070