RFR: 8239095: Upgrade libFFI to the latest 3.3 version

Tue Jun 2 11:24:39 UTC 2020

On Fri, 29 May 2020 01:24:29 GMT, Alexander Matveev <almatvee at openjdk.org> wrote:

> - Updated libffi to 3.3.

I tested this and couldn't find issues. The uncommented line worries me a bit, though, but I can't see a reason why it
should be commented again.

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Marked as reviewed by jvos (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/242