RFR: 6651: Securing exposed public static array

[Marcus Hirt]

A version not exposing the magic bytes to corruption by a malicious user

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Commits:
 - ec41d1d4: 6651: Securing exposed public static array

Changes: https://git.openjdk.java.net/jmc/pull/18/files
 Webrev: https://webrevs.openjdk.java.net/jmc/18/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JMC-6651
  Stats: 70 lines in 2 files changed: 68 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jmc/pull/18.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/18/head:pull/18

PR: https://git.openjdk.java.net/jmc/pull/18