[libFuzzer] add a position hint to the dictionary-based mutator

llvm-svn: 257013
diff --git a/llvm/lib/Fuzzer/FuzzerDriver.cpp b/llvm/lib/Fuzzer/FuzzerDriver.cpp
index e8c117e..595e397 100644
--- a/llvm/lib/Fuzzer/FuzzerDriver.cpp
+++ b/llvm/lib/Fuzzer/FuzzerDriver.cpp
@@ -286,7 +286,7 @@
   Fuzzer F(USF, Options);
 
   for (auto &U: Dictionary)
-    USF.GetMD().AddWordToDictionary(U.data(), U.size());
+    USF.GetMD().AddWordToManualDictionary(U);
 
   // Timer
   if (Flags.timeout > 0)