[jdk13u-dev] RFR: 8250844: Make sure {type, obj}ArrayOopDesc accessors check the bounds

[Yuri Nesterenko]

We need these asserts  in 13u, too. The patch doesn't require any adjustments, tier1 tests pass.

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Commit messages:
 - Backport ddb726d4a09ec6c87d4c2035c9d4f3642d9a151b

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/50/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=50&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8250844
  Stats: 28 lines in 2 files changed: 26 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/50.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/50/head:pull/50

PR: https://git.openjdk.java.net/jdk13u-dev/pull/50