RFR: JDK-8214710 Fix hg log in update_copyright_year.sh

[Alan Bateman]

On 03/12/2018 16:10, Magnus Ihse Bursie wrote:
> The commands for hg log is missing -l1, which will limit the log to 
> just the revision specified. Instead, all revisions from repo creation 
> will now be included, and the script fails to work.
>
> I will publish a separate changeset with missed copyright year updates 
> in the build system.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8214710
> WebRev: 
> http://cr.openjdk.java.net/~ihse/JDK-8214710-fix-update-copyright-year/webrev.01
>
This looks okay to me.

For the follow-on "missing copyright year updates" then maybe the entire 
source should be done rather than doing it in piecemeal.

-Alan