base-files: add nsswitch-resolved.conf and remove nsswitch patch

base-files: add nsswitch-resolved.conf and remove nsswitch patch

Due to changes to nsswitch.conf file on commit 0cb122f17cf2
("base-files: add gshadow entry in nsswitch.conf"), the current patch
does not apply anymore due to patch fuzz.

This fuzz wasn't detected before because this is a conditional patch,
and will be hard to detect if nsswitch.conf changes again.

Instead, add a new version of nsswitch.conf, called
nsswitch-resolved.conf, which will later be renamed accordingly based on
the DISTRO_FEATURES variable. This file contains the necessary changes
which were applied by the patch before.

Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>
Suggested-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>