[OPENMP50]Basic parsing/sema analysis for order(concurrent) clause.

Added parsing/sema/serialization support for order(concurrent) clause in
loop|simd-based directives.
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index 382ea5c..0b519a6 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -775,6 +775,7 @@
   for (auto *E : C->private_refs())
     Profiler->VisitStmt(E);
 }
+void OMPClauseProfiler::VisitOMPOrderClause(const OMPOrderClause *C) {}
 } // namespace
 
 void