[jdk21u-dev] RFR: 8323671: DevKit build gcc libraries contain full paths to source location

[Andrew Leonard]

To enable fully reproducible builds when using a DevKit, this is required so that static glibc binaries that are linked into some of the JDK libraries are identical.

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Commit messages:
 - Backport dd0694b9cbbfa2defdc3b09f86f20f686688cf7b

Changes: https://git.openjdk.org/jdk21u-dev/pull/250/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=250&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323671
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/250.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/250/head:pull/250

PR: https://git.openjdk.org/jdk21u-dev/pull/250