[foreign-memaccess+abi] RFR: 8300201: When storing MemoryAddress.ofLong(0x0000000080000000L), MemorySegment.get is not equal to MemorySegment.set because of the expanded sign

[Per Minborg]

This PR proposes to normalize the upper 32-bit to zero on 32-bit systems.

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Commit messages:
 - Fix typo
 - Update copyright year
 - Normalize address for 32-bit systems

Changes: https://git.openjdk.org/panama-foreign/pull/774/files
 Webrev: https://webrevs.openjdk.org/?repo=panama-foreign&pr=774&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300201
  Stats: 26 lines in 2 files changed: 22 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/panama-foreign/pull/774.diff
  Fetch: git fetch https://git.openjdk.org/panama-foreign pull/774/head:pull/774

PR: https://git.openjdk.org/panama-foreign/pull/774