[jdk11u-dev] RFR: 8282583: Update BCEL md to include the copyright notice

[Goetz Lindenmaier]

I backport this for parity with 11.0.16-oracle.

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

Commit messages:
 - Backport 8478173d837113bf603aadb614badd461f474250

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/936/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=936&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282583
  Stats: 8 lines in 1 file changed: 0 ins; 3 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/936.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/936/head:pull/936

PR: https://git.openjdk.java.net/jdk11u-dev/pull/936