[llvm-branch-commits] [flang] [flang][OpenMP] Use OmpDirectiveSpecification in THREADPRIVATE (PR #159632)

[Tom Eccles via llvm-branch-commits]

https://github.com/tblah approved this pull request.

LGTM, although maybe this should have the usual parse tree tests added?

https://github.com/llvm/llvm-project/pull/159632