[foreign-memaccess+abi] RFR: Fix another slip up in spliterator test

[Maurizio Cimadamore]

I thought I had fixed all references to old factory method names, but I missed another bunch in the segment spliterator data provider.

I have now ran all tests in jdk_util and they all pass.

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Commit messages:
 - Fix another slip up in spliterator test

Changes: https://git.openjdk.java.net/panama-foreign/pull/505/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=505&range=00
  Stats: 7 lines in 1 file changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/505.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/505/head:pull/505

PR: https://git.openjdk.java.net/panama-foreign/pull/505