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

llvm-svn: 188447
diff --git a/clang/test/CodeGenCXX/member-initializers.cpp b/clang/test/CodeGenCXX/member-initializers.cpp
index c22b99d..c98e6bf 100644
--- a/clang/test/CodeGenCXX/member-initializers.cpp
+++ b/clang/test/CodeGenCXX/member-initializers.cpp
@@ -12,7 +12,7 @@
   int i;
 };
 
-// CHECK: define i32 @_Z1fv() #0
+// CHECK-LABEL: define i32 @_Z1fv() #0
 int f() {
   B b;