util-linux: Disable chfn-chsh on non-target builds
They are also provided by shadow-native e.g. when building native
recipes and packages where they depend on both shadow-native and
util-linux-native, this can conflict
Enable it only when pam is enabled in distro
Fixes
ERROR: systemd-1_248.3-r0 do_prepare_recipe_sysroot: The file /usr/bin/chsh is installed by both util-linux-native and shadow-native, aborting
Signed-off-by: Khem Raj <raj.khem@gmail.com> Cc: Ross Burton <ross.burton@arm.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>