[OpenMP] Sema and parsing for 'teams distribute' pragma

This patch is to implement sema and parsing for 'teams distribute' pragma.

Differential Revision: https://reviews.llvm.org/D23189

llvm-svn: 277818
diff --git a/clang/include/clang-c/Index.h b/clang/include/clang-c/Index.h
index dbc5c33..170e4e7 100644
--- a/clang/include/clang-c/Index.h
+++ b/clang/include/clang-c/Index.h
@@ -2329,7 +2329,11 @@
    */
   CXCursor_OMPTargetSimdDirective = 270,
 
-  CXCursor_LastStmt = CXCursor_OMPTargetSimdDirective,
+  /** \brief OpenMP teams distribute directive.
+   */
+  CXCursor_OMPTeamsDistributeDirective = 271,
+
+  CXCursor_LastStmt = CXCursor_OMPTeamsDistributeDirective,
 
   /**
    * \brief Cursor that represents the translation unit itself.