tests: event: add tests for gpiod_line_get_value_bulk events
tests: event: add tests for gpiod_line_get_value_bulk events

Add tests to verify the behaviour of gpiod_line_get_value_bulk when
applied to a bulk of event lines.

Signed-off-by: Kent Gibson <6bfcbbb63210ea7de0af172018fe9973db4249b7@gmail.com>
Signed-off-by: Bartosz Golaszewski <e5d45fddd9040473413b909b802f629a971ad04c@baylibre.com>

brgl/libgpiod,brgl/libgpiod,brgl/libgpiod,brgl/libgpiod