uwt: don't log ENOENT from watch callbacks
uwt: don't log ENOENT from watch callbacks

It's expected that config files we watch might not exist.

Signed-off-by: David Scott <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@recoil.org>

djs55/vpnkit,djs55/vpnkit,djs55/vpnkit