RFR: 8237360: Add tests that test binding recipe generation directly

[Jorn Vernee]

Continuation of: _https://mail.openjdk.java.net/pipermail/panama-dev/2020-February/007417.html_

> Hi,
> 
> Please review the following patch that adds tests for the binding recipe 
> generators. These tests are more or less transcribed from the old 
> CallingSequenceBuilder tests on the foreign branch.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8237360
> Webrev: 
> http://cr.openjdk.java.net/~jvernee/panama/webrevs/8237360/webrev.00/
> 
> This also helped me find a couple of bugs in the Aarch64 CallArranger 
> that I introduced in an earlier patch, which I've fixed.
> 
> Thanks,
> Jorn

-------------

Commits:
 - 9e199c87: Add some tests for binding generators

Changes: https://git.openjdk.java.net/panama-foreign/pull/1/files
 Webrev: https://webrevs.openjdk.java.net/panama-foreign/1/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8237360
  Stats: 1218 lines in 9 files changed: 1197 ins; 0 del; 21 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/1.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/1/head:pull/1

PR: https://git.openjdk.java.net/panama-foreign/pull/1