git: openjdk/jdk: 8132984: incorrect type for Reference.discovered

[Kim Barrett]

Changeset: 33dcc00c
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2021-01-19 19:14:30 +0000
URL:       https://git.openjdk.java.net/jdk/commit/33dcc00c

8132984: incorrect type for Reference.discovered

Use unbounded wildcard placeholders, plus a new helper to get back to the Reference<T> domain.

Reviewed-by: rkennke, plevart, rriggs, mchung

! src/java.base/share/classes/java/lang/ref/Reference.java