RFR: 8268250: Class.arrayType() for a 255-d array throws undocumented IllegalArgumentException

[Joe Darcy]

Make explicit illegal argument cases of Class.arrayType.

Please also review the corresponding CSR: https://bugs.openjdk.java.net/browse/JDK-8268300

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Commit messages:
 - Add test file.
 - Merge branch 'master' into 8268250
 - 8268250: Class.arrayType() for a 255-d array throws undocumented IllegalArgumentException

Changes: https://git.openjdk.java.net/jdk/pull/4382/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4382&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268250
  Stats: 55 lines in 2 files changed: 55 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4382.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4382/head:pull/4382

PR: https://git.openjdk.java.net/jdk/pull/4382