Apply patch from Alexander Botero-Lowry that adds FreeBSD platform

tools/utils.py

 # Copyright 2008 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
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 24 matching lines @@
   list = []
   for line in open(name):
     if '#' in line:
       line = line[:line.find('#')]
     line = line.strip()
     if len(line) == 0:
       continue
     list.append(line)
   return list
 
-  
+
 def GuessOS():
   id = platform.system()
   if id == 'Linux':
     return 'linux'
   elif id == 'Darwin':
     return 'macos'
   elif id == 'Windows' or id == 'Microsoft':
     # On Windows Vista platform.system() can return 'Microsoft' with some
     # versions of Python, see http://bugs.python.org/issue1082
     return 'win32'
+  elif id == 'FreeBSD':
+    return 'freebsd'
   else:
     return None
 
 
 def GuessArchitecture():
   id = platform.machine()
   if id.startswith('arm'):
     return 'arm'
   elif (not id) or (not re.match('(x|i[3-6])86', id) is None):
     return 'ia32'
   else:
     return None
 
 
 def GuessWordsize():
   if '64' in platform.machine():
     return '64'
   else:
     return '32'
 
 
 def IsWindows():
   return GuessOS() == 'win32'