Update cpplint.py for compatibility with Python 3

[cclauss]

xrange() was removed in Python 3 in favor of range(). This PR ensures similar functionality on both Python 2 and Python 3.

Similar to https://github.com/nodejs/nan/pull/797

Discovered via https://travis-ci.com/nodejs/node/builds/79706150 (https://github.com/nodejs/node/pull/21942)

flake8 testing of https://github.com/nodejs/node-chakracore on Python 3.7.0

$ flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics

./tools/cpplint.py:1471:12: F821 undefined name 'xrange'
  for i in xrange(startpos, len(line)):
           ^
./tools/cpplint.py:1700:15: F821 undefined name 'xrange'
  for line in xrange(1, min(len(lines), 11)):
              ^
./tools/cpplint.py:1828:12: F821 undefined name 'xrange'
  for i in xrange(1, len(raw_lines) - 1):
           ^
./tools/cpplint.py:2169:14: F821 undefined name 'xrange'
    for i in xrange(linenum - 1, self.starting_linenum, -1):
             ^
./tools/cpplint.py:2950:26: F821 undefined name 'xrange'
    for start_linenum in xrange(linenum, clean_lines.NumLines()):
                         ^
./tools/cpplint.py:3437:14: F821 undefined name 'xrange'
    for i in xrange(first_line, last_line + 1, 1):
             ^
./tools/cpplint.py:3501:19: F821 undefined name 'xrange'
    for offset in xrange(endlinenum + 1,
                  ^
./tools/cpplint.py:4047:14: F821 undefined name 'xrange'
    for i in xrange(linenum + 1, end_line):
             ^
./tools/cpplint.py:4218:23: F821 undefined name 'unicode'
  if isinstance(line, unicode):
                      ^
./tools/cpplint.py:4870:12: F821 undefined name 'xrange'
  for i in xrange(linenum, max(-1, linenum - 10), -1):
           ^
./tools/cpplint.py:4891:12: F821 undefined name 'xrange'
  for i in xrange(linenum, max(-1, linenum - 10), -1):
           ^
./tools/cpplint.py:4907:12: F821 undefined name 'xrange'
  for i in xrange(linenum, 1, -1):
           ^
./tools/cpplint.py:5008:20: F821 undefined name 'xrange'
          for i in xrange(startline, linenum + 1):
                   ^
./tools/cpplint.py:5032:14: F821 undefined name 'xrange'
    for i in xrange(linenum - 1, max(0, linenum - 10), -1):
             ^
./tools/cpplint.py:5063:14: F821 undefined name 'xrange'
    for i in xrange(2):
             ^
./tools/cpplint.py:5226:14: F821 undefined name 'xrange'
    for i in xrange(linenum - 1, max(0, linenum - 5), -1):
             ^
./tools/cpplint.py:5442:18: F821 undefined name 'xrange'
  for linenum in xrange(clean_lines.NumLines()):
                 ^
./tools/cpplint.py:5573:21: F821 undefined name 'xrange'
  for start_line in xrange(linenum, min(linenum + 3, clean_lines.NumLines())):
                    ^
./tools/cpplint.py:5588:12: F821 undefined name 'xrange'
  for i in xrange(end_line, min(end_line + 3, clean_lines.NumLines())):
           ^
./tools/cpplint.py:5845:15: F821 undefined name 'xrange'
  for line in xrange(clean_lines.NumLines()):
              ^

Checklist

• [ ] make -j4 test (UNIX), or vcbuild test (Windows) passes
• [ ] tests and/or benchmarks are included
• [ ] documentation is changed or added
• [ ] commit message follows commit guidelines

[cclauss]

Searching for Clang... ERROR: clang++ not found. You could use clang++ from a custom location.

[MSLaguana]

Thanks for the PR! This file looks to be unchanged from the upstream https://github.com/nodejs/node repository, so rather than introducing an unnecessary difference in our fork, could you please open an equivalent PR against them? We'll get the change after it merges in as part of our regular updates from upstream, and this way the greater nodejs community gets the benefit.

[cclauss]

Made in upstream https://github.com/nodejs/node

[MSLaguana]

Thanks!