Adds missing classpath exception to the header of two GPLv2 files. Requested [here](https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2022-April/013988.html).
------------- Commit messages: - Add classpath excemption to copyright header Changes: https://git.openjdk.java.net/jdk/pull/8508/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8508&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8286029 Stats: 6 lines in 2 files changed: 4 ins; 0 del; 2 mod Patch: https://git.openjdk.java.net/jdk/pull/8508.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8508/head:pull/8508 PR: https://git.openjdk.java.net/jdk/pull/8508
