Remove 'not' from some CodeGen tests

These were just missing an expected-no-diagnostics directive.

Also add -std=c++11 to a test warning noisly about extensions.

llvm-svn: 197308
diff --git a/clang/test/CodeGenCXX/delete-two-arg.cpp b/clang/test/CodeGenCXX/delete-two-arg.cpp
index f8e6bff..be3cf1a 100644
--- a/clang/test/CodeGenCXX/delete-two-arg.cpp
+++ b/clang/test/CodeGenCXX/delete-two-arg.cpp
@@ -1,4 +1,5 @@
-// RUN: not %clang_cc1 -triple i686-pc-linux-gnu %s -o - -emit-llvm -verify | FileCheck %s
+// RUN: %clang_cc1 -triple i686-pc-linux-gnu %s -o - -emit-llvm -verify | FileCheck %s
+// expected-no-diagnostics
 
 typedef __typeof(sizeof(int)) size_t;