[libFuzzer] fix a minor regression in printing

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@319975 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerDriver.cpp b/FuzzerDriver.cpp
index 41eb50e..f6b642d 100644
--- a/FuzzerDriver.cpp
+++ b/FuzzerDriver.cpp
@@ -218,7 +218,7 @@
     Cmd.combineOutAndErr();
     if (Flags.verbosity) {
       std::string CommandLine = Cmd.toString();
-      Printf("%s", CommandLine.c_str());
+      Printf("%s\n", CommandLine.c_str());
     }
     int ExitCode = ExecuteCommand(Cmd);
     if (ExitCode != 0)