[libFuzzer] make sure we don't execute libFuzzer's mem* and str* hooks while calling mem*/str* inside libFuzzer itself

llvm-svn: 299167
diff --git a/llvm/lib/Fuzzer/FuzzerMutate.cpp b/llvm/lib/Fuzzer/FuzzerMutate.cpp
index c9768e4..cd846c7 100644
--- a/llvm/lib/Fuzzer/FuzzerMutate.cpp
+++ b/llvm/lib/Fuzzer/FuzzerMutate.cpp
@@ -202,7 +202,7 @@
     const void *Arg1Mutation, const void *Arg2Mutation,
     size_t ArgSize, const uint8_t *Data,
     size_t Size) {
-  ScopedDoingMyOwnMemmem scoped_doing_my_own_memmem;
+  ScopedDoingMyOwnMemOrStr scoped_doing_my_own_mem_os_str;
   bool HandleFirst = Rand.RandBool();
   const void *ExistingBytes, *DesiredBytes;
   Word W;