[clang] [clang][OpenMP] Add OMP 6.0 prefer_type({fr,attr}) parsing for interop (PR #198868)

[Alexey Bataev via cfe-commits]

https://github.com/alexey-bataev commented:

Need to update CIndex.cpp, OMPClauseEnqueue::VisitOMPInitClause, do the same as in RecursiveASTVisitor.h  

https://github.com/llvm/llvm-project/pull/198868