dracut: Fix the multi-lib config

When enabling multi-lib,following error occured:

| install: cannot create regular file 'build-dir/build-yocto/tmp/work/aarch64-ubinux-linux/dracut/108/image/usr/lib64/dracut/dracut.conf.d/': No such file or directory

Signed-off-by: Liu Yiding <liuyd.fnst@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-initramfs/recipes-devtools/dracut/dracut_108.bb

@@ -76,7 +76,7 @@ systemdsystemconfdir=${sysconfdir}/systemd/system
 systemduser=${systemd_user_unitdir}
 systemduserconfdir=${sysconfdir}/systemd/user
 EOF
-        install -m 0644 ${B}/${DISTRO}.conf ${D}${libdir}/dracut/dracut.conf.d/
+        install -m 0644 ${B}/${DISTRO}.conf ${D}${nonarch_libdir}/dracut/dracut.conf.d/
     fi
 }