[lib/Fuzzer] when -sync_command=<CMD> is given, periodically execute 'CMD CORPUS' to synchronize with other processes

llvm-svn: 237617
diff --git a/llvm/lib/Fuzzer/FuzzerIO.cpp b/llvm/lib/Fuzzer/FuzzerIO.cpp
index 7136d38..c6636c8 100644
--- a/llvm/lib/Fuzzer/FuzzerIO.cpp
+++ b/llvm/lib/Fuzzer/FuzzerIO.cpp
@@ -83,7 +83,7 @@
 
 void PrintFileAsBase64(const std::string &Path) {
   std::string Cmd = "base64 -w 0 < " + Path + "; echo";
-  system(Cmd.c_str());
+  ExecuteCommand(Cmd);
 }
 
 }  // namespace fuzzer