[foreign-abi] RFR 8237357: Add verification code for binding recipes

[Jorn Vernee]

Hi,

Please review the following patch that adds verification code for 
binding recipes.

Bug: https://bugs.openjdk.java.net/browse/JDK-8237357
Webrev: 
http://cr.openjdk.java.net/~jvernee/panama/webrevs/8237357/webrev.00/

Tested on Windows and Linux (WSL).

I'll hold off on pushing until the repo has been fixed.

Thanks,
Jorn