[OpenMP] Parsing and sema support for thread_limit clause.

http://reviews.llvm.org/D15029

llvm-svn: 254207
diff --git a/clang/lib/Basic/OpenMPKinds.cpp b/clang/lib/Basic/OpenMPKinds.cpp
index 1459773..13cd1b9 100644
--- a/clang/lib/Basic/OpenMPKinds.cpp
+++ b/clang/lib/Basic/OpenMPKinds.cpp
@@ -136,6 +136,7 @@
   case OMPC_threads:
   case OMPC_simd:
   case OMPC_num_teams:
+  case OMPC_thread_limit:
     break;
   }
   llvm_unreachable("Invalid OpenMP simple clause kind");
@@ -235,6 +236,7 @@
   case OMPC_threads:
   case OMPC_simd:
   case OMPC_num_teams:
+  case OMPC_thread_limit:
     break;
   }
   llvm_unreachable("Invalid OpenMP simple clause kind");