[libFuzzer] make CrossOver just one of the other mutations

llvm-svn: 256081
diff --git a/llvm/lib/Fuzzer/test/FuzzerUnittest.cpp b/llvm/lib/Fuzzer/test/FuzzerUnittest.cpp
index b92e618..8c00127 100644
--- a/llvm/lib/Fuzzer/test/FuzzerUnittest.cpp
+++ b/llvm/lib/Fuzzer/test/FuzzerUnittest.cpp
@@ -239,7 +239,7 @@
   TestShuffleBytes(&MutationDispatcher::Mutate_ShuffleBytes, 1 << 15);
 }
 TEST(FuzzerMutate, ShuffleBytes2) {
-  TestShuffleBytes(&MutationDispatcher::Mutate, 1 << 16);
+  TestShuffleBytes(&MutationDispatcher::Mutate, 1 << 19);
 }
 
 void TestAddWordFromDictionary(Mutator M, int NumIter) {