[Clang][CIR] fix enumeration value 'OMPGroupPrivate' not handled in switch (#159694)

Author: makslevental

clang/lib/CIR/CodeGen/CIRGenDecl.cpp

@@ -665,8 +665,9 @@ void CIRGenFunction::emitDecl(const Decl &d, bool evaluateConditionDecl) {
   case Decl::ImplicitConceptSpecialization:
   case Decl::TopLevelStmt:
   case Decl::UsingPack:
-  case Decl::OMPDeclareReduction:
   case Decl::OMPDeclareMapper:
+  case Decl::OMPDeclareReduction:
+  case Decl::OMPGroupPrivate:
     cgm.errorNYI(d.getSourceRange(),
                  std::string("emitDecl: unhandled decl type: ") +
                      d.getDeclKindName());