RFR: 8261753: Test java/lang/System/OsVersionTest.java still failing on BigSur patch versions after JDK-8253702

[Christoph Langer]

After the fix for JDK-8253702, the test java/lang/System/OsVersionTest.java still fails on BigSur versions that have a patch version (> 1), e.g. on macOS Big Sur 11.2.1, and where the JDK was built with xcode < 12.

java.lang.Error: 11.2 != 11.2.1

This is a proposal to relax the test and throw a SkippedException in such cases.

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Commit messages:
 - JDK-8261753

Changes: https://git.openjdk.java.net/jdk/pull/2576/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2576&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261753
  Stats: 14 lines in 1 file changed: 12 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2576.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2576/head:pull/2576

PR: https://git.openjdk.java.net/jdk/pull/2576