[LINTER] Check for header guard closure comment

Summary:
This enforces setting the header guard as a comment following the
#endif statement.
Includes the fix for the header files violating the rule.

Test Plan:
Should return nothing:

arc lint --everything

Remove the comment of an header guard and check the linter catches it.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D4218