Add __future__ imports to increase compatibility with Python 3. Derive Option from object to make it a new-style class for Python 3 compatibility.

src/bootstrap/bootstrap.py

@@ -8,7 +8,7 @@
 # option. This file may not be copied, modified, or distributed
 # except according to those terms.
 
-from __future__ import print_function
+from __future__ import absolute_import, division, print_function
 import argparse
 import contextlib
 import datetime

src/bootstrap/bootstrap_test.py

@@ -10,6 +10,7 @@
 
 """Bootstrap tests"""
 
+from __future__ import absolute_import, division, print_function
 import os
 import doctest
 import unittest

src/bootstrap/configure.py

@@ -11,6 +11,7 @@
 
 # ignore-tidy-linelength
 
+from __future__ import absolute_import, division, print_function
 import sys
 import os
 rust_dir = os.path.dirname(os.path.abspath(__file__))
@@ -19,7 +20,7 @@ rust_dir = os.path.dirname(rust_dir)
 sys.path.append(os.path.join(rust_dir, "src", "bootstrap"))
 import bootstrap
 
-class Option:
+class Option(object):
     def __init__(self, name, rustbuild, desc, value):
         self.name = name
         self.rustbuild = rustbuild