init: fsck: fix kmsg log writes

packages/sysutils/busybox/scripts/init

@@ -533,7 +533,9 @@ check_disks() {
         break
       fi
     done
-    sed -e '/^$/d' -e 's/^/fsck: /' </dev/fsck.latest >/dev/kmsg
+    while read line; do
+      [ -n "$line" ] && echo "fsck: ${line::160}" >/dev/kmsg
+    done </dev/fsck.latest
     rm -f /dev/fsck.latest
   fi
 }