[foreign-jextract] RFR: JDK-8244601: Cleanup support for upcall handles (jextract part)

[Athijegannathan Sundararajan]

On Thu, 7 May 2020 14:57:27 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This small patch fixes jextract to sync up with latest changes on SystemABI::upcallHandle.

Marked as reviewed by sundar (Committer).

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PR: https://git.openjdk.java.net/panama-foreign/pull/155