RFR: 8279315: Add Git support to update_copyright_year.sh script [v2]

[Erik Joelsson]

On Mon, 17 Jan 2022 08:17:01 GMT, Dmitry Kulikov <duke at openjdk.java.net> wrote:

>> Modified the `make/scripts/update_copyright_year.sh` script to support Git as well as Mercurial, as per [JDK-8279315](https://bugs.openjdk.java.net/browse/JDK-8279315). Also added the ability to specify company name as a command line argument instead of being hard-coded into the script.
>
> Dmitry Kulikov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add VCS auto-detection

Marked as reviewed by erikj (Reviewer).

If you need help sponsoring the change, I can do that. You just need to follow the bots instructions and issue the integrate command first.

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PR: https://git.openjdk.java.net/jdk/pull/7027