RFR: 8320192: SHAKE256 does not work correctly if n >= 137 [v4]

[Weijun Wang]

> When blocksize is less than digest output length, call `keccak` more.

Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:

  minimize code changes

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/16698/files
  - new: https://git.openjdk.org/jdk/pull/16698/files/4133fdc1..80a6fe66

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16698&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16698&range=02-03

  Stats: 105 lines in 4 files changed: 1 ins; 95 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/16698.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16698/head:pull/16698

PR: https://git.openjdk.org/jdk/pull/16698