tools: merge custom cpplint with cpplint v1.3.0

Merged https://github.com/cpplint/cpplint/blob/master/cpplint.py with
our customized version to enable better IDE/editor integration.

Made file executable.

PR-URL: #22864
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Daniel Bevenius <[email protected]>

Author: boneskull