[nicl] Removed static Context instance and reduced access levels when possible.

[Henry Jen]

Overall looks good.

We wanted to enable plug-in CodeFactory, thus Context.parse takes a provider of CodeFactory. That’s half-baked idea anyway, and currently the way to use different CodeFactory is to write another tool (Main in this case). Moved this from Main into Context is probably not a big deal, just we will need a different mechanism to allow that.

Cheers,
Henry


> On Feb 22, 2018, at 10:04 PM, Sundararajan Athijegannathan <sundararajan.athijegannathan at oracle.com> wrote:
> 
> jextract changes:
> 
> * Context static instance field removed. Current Context is passed around instead.
> * Reduced access levels of fields and methods when possible.
> 
> Please review: http://cr.openjdk.java.net/~sundar/jextract_no_static_context/webrev.00/
> 
> Thanks,
> -Sundar