[foreign-memaccess+abi] RFR: Clean up Utils

[Per Minborg]

This very small PR adds aesthetic fixed to `Utils`.

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Commit messages:
 - Clean up Utils

Changes: https://git.openjdk.org/panama-foreign/pull/767/files
 Webrev: https://webrevs.openjdk.org/?repo=panama-foreign&pr=767&range=00
  Stats: 6 lines in 1 file changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/panama-foreign/pull/767.diff
  Fetch: git fetch https://git.openjdk.org/panama-foreign pull/767/head:pull/767

PR: https://git.openjdk.org/panama-foreign/pull/767