[foreign-jextract] RFR 8238466: add jtreg test driver for jextract tool

[Maurizio Cimadamore]

Looks good

Maurizio

On 04/02/2020 10:41, sundararajan.athijegannathan at oracle.com wrote:
> Please review.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8238466
>
> Webrev: http://cr.openjdk.java.net/~sundar/8238466/webrev.00/
>
> PS. Piggybacking to fix a minor issue with vararg handling
>
> Thanks,
>
> -Sundar
>