[jdk13u-dev] RFR: 8240983: Incorrect copyright header in Apache Santuario 2.1.3 files

[Yuri Nesterenko]

This copyright fix makes further backports of Santuario easier. Trivial, clean patch.

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Commit messages:
 - Backport 9d502f648cd07e136638e3c53cb653eb40f073d3

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/318/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=318&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8240983
  Stats: 5 lines in 5 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/318.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/318/head:pull/318

PR: https://git.openjdk.java.net/jdk13u-dev/pull/318