[foreign-jextract] RFR: Fix issues caused by removal of the Foreign class

[Jorn Vernee]

On Thu, 23 Apr 2020 10:35:16 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This patch rewires jextract to use the new MemorySegment::ofNativeRestricted method.

Marked as reviewed by jvernee (Committer).

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PR: https://git.openjdk.java.net/panama-foreign/pull/129