[jdk8u-ri] RFR: JDK-8285497: Add system property for Java SE specification maintenance version

[Joe Darcy]

Backport of change from JDK 19.

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Commit messages:
 - JDK-8285497: Add system property for Java SE specification maintenance version

Changes: https://git.openjdk.java.net/jdk8u-ri/pull/8/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk8u-ri&pr=8&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285497
  Stats: 23 lines in 4 files changed: 20 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk8u-ri/pull/8.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk8u-ri pull/8/head:pull/8

PR: https://git.openjdk.java.net/jdk8u-ri/pull/8