Fixes of copyright headers: Should we downport them?

[Lindenmaier, Goetz]

Hi Andrew,

There are a row of changes fixing copyrights downported by Oracle to 11.0.8,
similar to this one:
https://bugs.openjdk.java.net/browse/JDK-8220414

See also 
https://bugs.openjdk.java.net/issues/?filter=38639

I'd consider them pretty pointless given the rules you set.
So should we skip them?
If so, I would mark them all as openjdk-na. 
(In my opinion we should downport them, but I'll follow 
your advice.)

Best regards,
  Goetz.