[Swarming] Allow overwriting archive location of fuzzer.

tools/fuzz-harness.sh

 #!/bin/bash
 # 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
 #       copyright notice, this list of conditions and the following
@@ skipping 34 matching lines @@
 fi
 
 if [ ! -f "$d8" ]; then
   echo "Failed to find d8 binary: $d8"
   exit 1
 fi
 
 # Deprecated download method. A prepatched archive is downloaded as a hook
 # if jsfunfuzz=1 is specified as a gyp flag. Requires google.com authentication
 # for google storage.
-if [ "$2" == "--download" ]; then
+if [ "$3" == "--download" ]; then
 
   jsfunfuzz_file="$v8_root/tools/jsfunfuzz.zip"
   if [ ! -f "$jsfunfuzz_file" ]; then
     echo "Downloading $jsfunfuzz_file ..."
     wget -q -O "$jsfunfuzz_file" $JSFUNFUZZ_URL || exit 1
   fi
 
   jsfunfuzz_sum=$(md5sum "$jsfunfuzz_file" | awk '{ print $1 }')
   if [ $jsfunfuzz_sum != $JSFUNFUZZ_MD5 ]; then
     echo "Failed to verify checksum!"
@@ skipping 19 matching lines @@
 EOF
   fi
 
 fi
 
 flags='--debug-code --expose-gc --verify-gc'
 python -u "$jsfunfuzz_dir/jsfunfuzz/multi_timed_run.py" 300 \
     "$d8" $flags "$jsfunfuzz_dir/jsfunfuzz/jsfunfuzz.js"
 exit_code=$(cat w* | grep " looking good" -c)
 exit_code=$((100-exit_code))
-archive=fuzz-results-$(date +%Y%m%d%H%M%S).tar.bz2
+
+if [ -n "$2" ]; then
+  archive="$2"
+else
+  archive=fuzz-results-$(date +%Y%m%d%H%M%S).tar.bz2
+fi
 echo "Creating archive $archive"
 tar -cjf $archive err-* w*
 rm -f err-* w*
 
 echo "Total failures: $exit_code"
 exit $exit_code