[jdk25u-dev] RFR: 8374642: EscapeHash macro fails with GNU make 4.3 and 4.4

[Goetz Lindenmaier]

I backport this for parity with 25.0.3-oracle.

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Commit messages:
 - Backport 383fe1efc3a23385b8576e20f458f91085c6325e

Changes: https://git.openjdk.org/jdk25u-dev/pull/176/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=176&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374642
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/176.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/176/head:pull/176

PR: https://git.openjdk.org/jdk25u-dev/pull/176