[libFuzzer] more refactoring

llvm-svn: 282113
diff --git a/llvm/lib/Fuzzer/FuzzerValueBitMap.h b/llvm/lib/Fuzzer/FuzzerValueBitMap.h
index 6f6ca11..07e52fc 100644
--- a/llvm/lib/Fuzzer/FuzzerValueBitMap.h
+++ b/llvm/lib/Fuzzer/FuzzerValueBitMap.h
@@ -12,6 +12,8 @@
 #ifndef LLVM_FUZZER_VALUE_BIT_MAP_H
 #define LLVM_FUZZER_VALUE_BIT_MAP_H
 
+#include "FuzzerDefs.h"
+
 namespace fuzzer {
 
 // A bit map containing kMapSizeInWords bits.