Workaround busybox's inability to detect symlinks with [ -e ].

link_files() won't remove symlinks at the destination, which could
cause trouble.

scripts/live-helpers

@@ -596,14 +596,11 @@ link_files ()
 			fi
 			link_files "${src}" "${dest}" "${src_mask}"
 		else
-			if [ -e "${dest}" ];
-			then
-				rm -rf "${dest}"
-			fi
 			if [ -n "${src}" ];
 			then
 				src="$(echo ${src} | sed "s|^${src_mask}||")"
 			fi
+			rm -rf "${dest}" 2> /dev/null
 			ln -s "${src}" "${dest}"
 		fi
 	done