RFR: 8313312: Add missing classpath exception copyright header [v2]

[Amit Kumar]

> Adds `classpath exception` in multiple files, affects copyright header only.

Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:

  revert java.lang.foreign changes

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15070/files
  - new: https://git.openjdk.org/jdk/pull/15070/files/d8d7cdf3..3958d9fe

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15070&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15070&range=00-01

  Stats: 12 lines in 4 files changed: 0 ins; 8 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/15070.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15070/head:pull/15070

PR: https://git.openjdk.org/jdk/pull/15070