GN: Fix flags writing for targets with unsupported PCHs

tools/gn/ninja_binary_target_writer.cc

 // Copyright (c) 2013 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 "tools/gn/ninja_binary_target_writer.h"
 
 #include <stddef.h>
 #include <string.h>
 
 #include <cstring>
@@ skipping 462 matching lines @@
       std::vector<OutputFile> outputs;
       GetPCHOutputFiles(target_, tool_type, &outputs);
       if (!outputs.empty()) {
         // Trim the .gch suffix for the -include flag.
         // e.g. for gch file foo/bar/target.precompiled.h.gch:
         //          -include foo/bar/target.precompiled.h
         std::string pch_file = outputs[0].value();
         pch_file.erase(pch_file.length() - 4);
         out_ << " -include " << pch_file;
       }
+    } else {
+      RecursiveTargetConfigStringsToStream(target_, getter,
+                                           flag_escape_options, out_);
     }
   } else {
     RecursiveTargetConfigStringsToStream(target_, getter,
                                          flag_escape_options, out_);
   }
   out_ << std::endl;
 }
 
 void NinjaBinaryTargetWriter::WritePCHCommands(
     const SourceFileTypeSet& used_types,
@@ skipping 572 matching lines @@
           "\n"
           "In the latter case, either rename one of the files or move one of\n"
           "the sources to a separate source_set to avoid them both being in\n"
           "the same target.");
       g_scheduler->FailWithError(err);
       return false;
     }
   }
   return true;
 }