bashrc: set alias ls="busybox ls --color=auto"

without "auto", scripting fails e.g.
 for i in `ls /`;do
     if [ -e /$i ];
     then
         echo pass
     else
         echo fail
     fi
 done

Change-Id: Id2563143ed2c359933c5b861cc2299f387e34d9c

etc/bashrc

@@ -42,7 +42,7 @@ for i in cat chmod chown df insmod ln lsmod mkdir mount mv rm rmdir rmmod umount
 	eval alias ${i}=\"busybox ${i}\"
 done
 unset i
-alias ls='busybox ls --color'
+alias ls='busybox ls --color=auto'
 
 # Try to keep environment pollution down, EPA loves us.
 unset use_color safe_term match_lhs