introduce android_x64 build target

tools/run-tests.py

 #!/usr/bin/env python
 #
 # Copyright 2012 the V8 project authors. All rights reserved.
 # 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.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 112 matching lines @@
 }
 
 GC_STRESS_FLAGS = ["--gc-interval=500", "--stress-compaction",
                    "--concurrent-recompilation-queue-length=64",
                    "--concurrent-recompilation-delay=500",
                    "--concurrent-recompilation"]
 
 SUPPORTED_ARCHS = ["android_arm",
                    "android_arm64",
                    "android_ia32",
+                   "android_x64",
                    "arm",
                    "ia32",
                    "x87",
                    "mips",
                    "mipsel",
                    "mips64el",
                    "nacl_ia32",
                    "nacl_x64",
                    "ppc",
                    "ppc64",
                    "x64",
                    "x32",
                    "arm64"]
 # Double the timeout for these:
 SLOW_ARCHS = ["android_arm",
               "android_arm64",
               "android_ia32",
+              "android_x64",
               "arm",
               "mips",
               "mipsel",
               "mips64el",
               "nacl_ia32",
               "nacl_x64",
               "x87",
               "arm64"]
 
 
@@ skipping 465 matching lines @@
   exit_code = runner.Run(options.j)
   overall_duration = time.time() - start_time
 
   if options.time:
     verbose.PrintTestDurations(suites, overall_duration)
   return exit_code
 
 
 if __name__ == "__main__":
   sys.exit(Main())