[foreign-jextract] RFR: 8261642: improve jextract source generation mode and remove class generation

[Maurizio Cimadamore]

On Sun, 2021-02-14 at 13:34 +0000, Duncan Gittins wrote:
> I still think having an option to cut down the symbols will help
> when 
> 
> run against the monster Windows headers, but Eclipse is happy with
> what 
> 
> I get now even though the jars could be x20 smaller.

We will definitively add more filtering capabilities - but we wanted to
"clean up the house" before doing that :-)

CheersMaurizio