RFR: 8286029: Add classpath exemption to globals_vectorApiSupport_***.S.inc

[Tyler Steele]

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).

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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