Add fnmatch.h

[epilys]

Add fnmatch() function and FNM_* constants.

Signed-off-by: Manos Pitsidianakis [email protected]

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @tgross35 (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

• @rustbot author: the review is finished, PR author should check the comments and take action accordingly
• @rustbot review: the author is ready for a review, this PR will be queued again in the reviewer's queue

[tgross35]

Thanks for the PR! Could you link the relevant headers and/or docs?

Also the relevant files in libc-test/semver should be updated with the additions.

@rustbot author (just comment @rustbot review once you are all set)

[epilys]

Thank you!

Added header file documentation in commit message:

Add fnmatch() function and FNM_* constants.

Documentation:

Header file:
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/fnmatch.h.html

fnmatch() function:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/fnmatch.html

Signed-off-by: Manos Pitsidianakis <[email protected]>

@rustbot review