RFR: 8354453: Don't strcpy in os::strdup, use memcpy instead

[Anton Artemov]

Use memcpy instead of strcpy in os::strdup, 1 string pass fewer.

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Commit messages:
 - 8354453: Don't strcpy in os::strdup, use memcpy instead

Changes: https://git.openjdk.org/jdk/pull/24651/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24651&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354453
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24651.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24651/head:pull/24651

PR: https://git.openjdk.org/jdk/pull/24651