[xb] Cleanup, use maintained version of cpplint

https://github.com/google/styleguide/pull/837

.gitmodules

@@ -106,3 +106,6 @@
 [submodule "third_party/libusb"]
 	path = third_party/libusb
 	url = https://github.com/libusb/libusb.git
+[submodule "third_party/cpplint"]
+	path = third_party/cpplint
+	url = https://github.com/cpplint/cpplint.git

third_party/cpplint

@@ -0,0 +1 @@
+Subproject commit 350702a4d39395571bd118c9a3cff0a573488d61

third_party/google-styleguide/cpplint/README

@@ -1,45 +0,0 @@
-This is automated checker to make sure a C++ file follows Google's C++ style
-guide (https://google.github.io/styleguide/cppguide.html). As it
-heavily relies on regular expressions, cpplint.py won't catch all violations of
-the style guide and will very occasionally report a false positive. There is a
-list of things we currently don't handle very well at the top of cpplint.py,
-and we welcome patches to improve it.
-
-The linting tool takes a list of files as input. For full usage instructions,
-please see the output of:
-
-  ./cpplint.py --help
-
-Unit tests are provided in cpplint_unittest.py. This file can safely be ignored
-by end users who have downloaded this package and only want to run the lint
-tool.
-
----
-
-cpplint.py and its corresponding unit tests are Copyright (C) 2009 Google Inc.
-
-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 with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.