RFR(T): 8223395: PPC64: Improve comments in the JVM signal handler to match ISA text

[Gustavo Romero]

Hi Martin,

On 05/06/2019 11:30 AM, Doerr, Martin wrote:
> looks good and trivial. Thanks for improving the comments.
> 
> Feel free to push with updated copyrights.

Thanks for the review!

Pushed with updated copyrights (sorry for missing the updates again on v1):

http://hg.openjdk.java.net/jdk/jdk/rev/b39365cebb73

Best regards,
Gustavo