[jdk15u-dev] RFR: 8297027: Fix broken aarch64 build of 13u/15u after bad backport of 8293044

[Yuri Nesterenko]

Change argument of is_patching_needed() to thread, in this release, and remove some stray garbage left from a conflict resolution.

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Commit messages:
 - Broken build on aarch64

Changes: https://git.openjdk.org/jdk15u-dev/pull/304/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk15u-dev&pr=304&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297027
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk15u-dev/pull/304.diff
  Fetch: git fetch https://git.openjdk.org/jdk15u-dev pull/304/head:pull/304

PR: https://git.openjdk.org/jdk15u-dev/pull/304