[Chapel Merge] Fix unordered atomics test w.r.t. CPtr

Branch: refs/heads/master
Revision: bd19983
Author: bradcray
Log Message:

Merge pull request #16484 from bradcray/fix-unordered-atomics-for-cptr

Fix unordered atomics test w.r.t. CPtr

[trivial, not reviewed]

This is a case that requires a use CPtr; now that its symbols aren’t automatically available.

Modified Files:
M test/runtime/configMatters/interop/unordered-atomics.chpl

Compare: https://github.com/chapel-lang/chapel/compare/bf9e113f1999...bd199832e851