Fix up java.util.zip.ZipFile$Source hashCode() impl so that duplicate Source objects aren't created for the same zip file.
------------- Commit messages: - Initial changes Changes: https://git.openjdk.org/jdk/pull/16115/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16115&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8317678 Stats: 133 lines in 2 files changed: 131 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/16115.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16115/head:pull/16115 PR: https://git.openjdk.org/jdk/pull/16115
