core: add gpiod_line_bulk_get_line()
core: add gpiod_line_bulk_get_line()

Add a getter function for retrieving line handles from bulk objects.

Signed-off-by: Bartosz Golaszewski <108de5fbc428215dc26df4468b48691526611148@gmail.com>

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