RFR: 8243583: Change 'final' error checks to throw ICCE

[Harold Seigel]

Please review this small change to throw IncompatibleClassChangeError exceptions instead of VerifyError exceptions for attempts to override Final classes and methods, as described in https://bugs.openjdk.java.net/browse/JDK-8243582.

The fix was tested with tiers 1-2 on Linux, Mac OSX, and Windows, tiers 3-5 on Linux x64, and running the JCK lang, vm, and api tests.

Thanks, Harold

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Commit messages:
 - 8243583: Change 'final' error checks to throw ICCE

Changes: https://git.openjdk.java.net/jdk/pull/885/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=885&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8243583
  Stats: 29 lines in 4 files changed: 0 ins; 9 del; 20 mod
  Patch: https://git.openjdk.java.net/jdk/pull/885.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/885/head:pull/885

PR: https://git.openjdk.java.net/jdk/pull/885