RFR: 8263358: Update java.lang to use instanceof pattern variable

[Patrick Concannon]

Hi,

Could someone please review my code for updating the code in the `java.lang` package to make use of the `instanceof` pattern variable?

Kind regards,
Patrick

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Commit messages:
 - 8263358: Update java.lang to use instanceof pattern variable

Changes: https://git.openjdk.java.net/jdk/pull/2913/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2913&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263358
  Stats: 62 lines in 18 files changed: 0 ins; 31 del; 31 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2913.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2913/head:pull/2913

PR: https://git.openjdk.java.net/jdk/pull/2913