Fix gyp build.

src/snapshot/mksnapshot.cc

 // Copyright 2006-2008 the V8 project 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 <errno.h>
 #include <signal.h>
 #include <stdio.h>
 
 #include "include/libplatform/libplatform.h"
 #include "src/assembler.h"
@@ skipping 93 matching lines @@
     }
     return fp;
   }
 
   FILE* fp_;
   FILE* startup_blob_file_;
 };
 
 char* GetExtraCode(char* filename, const char* description) {
   if (filename == NULL || strlen(filename) == 0) return NULL;
-  if (strcmp(filename, "-") == 0) return NULL;
   ::printf("Loading script for %s: %s\n", description, filename);
   FILE* file = base::OS::FOpen(filename, "rb");
   if (file == NULL) {
     fprintf(stderr, "Failed to open '%s': errno %d\n", filename, errno);
     exit(1);
   }
   fseek(file, 0, SEEK_END);
   size_t size = ftell(file);
   rewind(file);
   char* chars = new char[size + 1];
@@ skipping 52 matching lines @@
     CHECK(blob.data);
     writer.WriteSnapshot(blob);
     delete[] blob.data;
   }
 
   V8::Dispose();
   V8::ShutdownPlatform();
   delete platform;
   return 0;
 }