Function libuci_sys::uci_set_savedir

pub unsafe extern "C" fn uci_set_savedir(
    ctx: *mut uci_context, 
    dir: *const c_char
) -> c_int

uci_set_savedir: override the default delta save directory @ctx: uci context @dir: directory name

This will also try adding the specified dir to the end of delta pathes.