RFR: CODETOOLS-7903245: Save copy of `make` command after running `make/build.sh`

[Iris Clark]

On Wed, 10 Aug 2022 21:00:42 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> Please review a simple change to save a copy of the make command generated by `make/build.sh`, for later reuse to bypass downloading and building dependencies.

Marked as reviewed by iris (Reviewer).

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PR: https://git.openjdk.org/jtreg/pull/98