[foreign-abi] RFR: 8247439: NativeAllocationScope should have a way to register existing segments onto it (followup)

[Maurizio Cimadamore]

This simple followup removes ownership check in case the registered segment is unconfined.

-------------

Commit messages:
 - Remove check for registering unconfined segments

Changes: https://git.openjdk.java.net/panama-foreign/pull/202/files
 Webrev: https://webrevs.openjdk.java.net/panama-foreign/202/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8247439
  Stats: 13 lines in 2 files changed: 11 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/202.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/202/head:pull/202

PR: https://git.openjdk.java.net/panama-foreign/pull/202