Update protobuf to r428, part 1.

third_party/protobuf/src/google/protobuf/compiler/subprocess.cc

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // http://code.google.com/p/protobuf/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
@@ skipping 15 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Author: kenton@google.com (Kenton Varda)
 
 #include <google/protobuf/compiler/subprocess.h>
 
 #include <algorithm>
+#include <iostream>
 
 #ifndef _WIN32
 #include <errno.h>
 #include <sys/select.h>
 #include <sys/wait.h>
 #include <signal.h>
 #endif
 
 #include <google/protobuf/stubs/common.h>
 #include <google/protobuf/message.h>
@@ skipping 405 matching lines @@
   }
 
   return true;
 }
 
 #endif  // !_WIN32
 
 }  // namespace compiler
 }  // namespace protobuf
 }  // namespace google