RFR: 8357106: Add missing classpath exception copyright headers

[Sorna Sarathi N]

This PR adds missing classpath exception

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

Commit messages:
 - Adds missing classpath exception

Changes: https://git.openjdk.org/jdk/pull/25261/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25261&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357106
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25261.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25261/head:pull/25261

PR: https://git.openjdk.org/jdk/pull/25261