RFR: 8361142: Improve custom hooks for makefiles

Tue Jul 1 12:08:23 UTC 2025

Add some additional and more fine-grained way in which custom makefiles can be integrated.

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Commit messages:
 - Missed hook for cleaning
 - Turns out these were needed after all...
 - 8361142: Improve custom hooks for makefiles

Changes: https://git.openjdk.org/jdk/pull/26060/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26060&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361142
  Stats: 38 lines in 8 files changed: 24 ins; 0 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/26060.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26060/head:pull/26060

PR: https://git.openjdk.org/jdk/pull/26060