[nicl] Adding ToolProvider implementation for jextract and a simple test for jextract tool

[Maurizio Cimadamore]

Looks good,
minor nit: you might want to use err/out from the Context instance 
inside Tool::main instead of duplicating the streams.

Maurizio



On 22/02/18 14:27, Sundararajan Athijegannathan wrote:
> Please review: 
> http://cr.openjdk.java.net/~sundar/jextract_tool_provider_and_test/webrev.00/
>
> Thanks,
> -Sundar