CHECK-LABEL-ify some code gen tests to improve diagnostic experience when tests fail.

llvm-svn: 188447
diff --git a/clang/test/CodeGenCXX/cxx-block-objects.cpp b/clang/test/CodeGenCXX/cxx-block-objects.cpp
index b989065..ff868fcd 100644
--- a/clang/test/CodeGenCXX/cxx-block-objects.cpp
+++ b/clang/test/CodeGenCXX/cxx-block-objects.cpp
@@ -25,9 +25,9 @@
         return 0;
 }
 
-// CHECK: define internal void @__copy_helper_block_
+// CHECK-LABEL: define internal void @__copy_helper_block_
 // CHECK: call void @_ZN1AC1ERKS_
 
 
-// CHECK:define internal void @__destroy_helper_block_
+// CHECK-LABEL:define internal void @__destroy_helper_block_
 // CHECK: call void @_ZN1AD1Ev