[libfuzzer] Fix compile error from missing courgette_fuzzer.cc include.

testing/libfuzzer/fuzzers/courgette_fuzzer.cc

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/scoped_ptr.h"
 #include "courgette/assembly_program.h"
 #include "courgette/courgette.h"
 #include "courgette/encoded_program.h"
+#include "courgette/program_detector.h"
 
 // Entry point for LibFuzzer.
 extern "C" int LLVMFuzzerTestOneInput(const unsigned char* data, size_t size) {
   scoped_ptr<courgette::AssemblyProgram> prog;
   courgette::Status status =
       courgette::ParseDetectedExecutable(data, size, &prog);
   if (status != courgette::C_OK) {
     return 0;
   }
   scoped_ptr<courgette::EncodedProgram> enc_prog(prog->Encode());
   return 0;
 }