Update test case: simply running "clang -checker-simple" doesn't invoke the dead store checker anymore. We need "-warn-dead-stores" as well.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53055 91177308-0d34-0410-b5e6-96231b3b80d8

test/Analysis/dead-stores.c

@@ -1,5 +1,7 @@
 // RUN: clang -warn-dead-stores -verify %s
-// RUN: clang -checker-simple -verify %s
+// RUN: clang -checker-simple -warn-dead-stores -verify %s
+// RUN: clang -warn-dead-stores -checker-simple -verify %s
+
 
 void f1() {
   int k, y;