Miguel Ángel Herranz Trillo

## Summary Add `flockfile()`, `ftrylockfile()` and `funlockfile()` functions [1] when the CONFIG_STDIO_DISABLE_BUFFERING is not set. [1] POSIX.1-2008 / System Interfaces / flockfile https://pubs.opengroup.org/onlinepubs/9699919799.2008edition/functions/flockfile.html ## Impact Extending current interfaces (backward compatible)....

### What happened? I am launching a Maven project and the tests fail with this log and stack trace (edited to remove private info about the project, and added `...`...

Related to https://github.com/thingsboard/thingsboard-ce-k8s/issues/100