Adds `classpath exception` in multiple files, affects copyright header only.
------------- Commit messages: - adds classpath exception Changes: https://git.openjdk.org/jdk/pull/15070/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15070&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8313312 Stats: 60 lines in 20 files changed: 40 ins; 0 del; 20 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
