package/libgpiod: bump version to v1.4.1

package/libgpiod: bump version to v1.4.1

This is a bug-fix release addressing the following issues:

- fix GCC8 warnings when building python bindings
- fix a bug in gpioinfo where lines used by the kernel without any
  consumer string were reported as unused
- fix a bug in line::event_get_fd() in C++ bindings where the exception
  wouldn't be thrown in error cases due to a missing 'throw' keyword

It also fixed a couple problems with the test-suite but it doesn't
affect the buildroot package.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>