RFR: 8332808: Always set java.io.tmpdir to a suitable value in the build [v2]

[Erik Joelsson]

On Thu, 23 May 2024 11:39:18 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> We should pass a good value for java.io.tmpdir to all java invocations in the build, that redirect any temporary files to somewhere under the build directory.
>> 
>> This bug was created as a result of the discussion regarding [JDK-8331348](https://bugs.openjdk.org/browse/JDK-8331348).
>
> Magnus Ihse Bursie has updated the pull request incrementally with one additional commit since the last revision:
> 
>   We should only explicitly append JAVA_FLAGS_TMPDIR for JAVAC and BUILD_JAVAC, not the JAVA invocations.

Marked as reviewed by erikj (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/19362#pullrequestreview-2073850837