Implement OpenCL event_t as Clang builtin type, including event_t related OpenCL restrictions (OpenCL 1.2 spec 6.9)

llvm-svn: 172973
diff --git a/clang/lib/CodeGen/CGRTTI.cpp b/clang/lib/CodeGen/CGRTTI.cpp
index 41b73e2..3d65892 100644
--- a/clang/lib/CodeGen/CGRTTI.cpp
+++ b/clang/lib/CodeGen/CGRTTI.cpp
@@ -197,6 +197,7 @@
     case BuiltinType::OCLImage2d:
     case BuiltinType::OCLImage2dArray:
     case BuiltinType::OCLImage3d:
+    case BuiltinType::OCLEvent:
       return true;
       
     case BuiltinType::Dependent: