sysupgrade: preserve symlinks in backups

Signed-off-by: Catalin Patulea <catalinp@google.com>

SVN-Revision: 42783

package/base-files/files/sbin/sysupgrade

@@ -102,14 +102,14 @@ add_uci_conffiles() {
 	local file="$1"
 	( find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
 		/etc/sysupgrade.conf /lib/upgrade/keep.d/* 2>/dev/null) \
-		-type f 2>/dev/null;
+		-type f -o -type l 2>/dev/null;
 	  opkg list-changed-conffiles ) | sort -u > "$file"
 	return 0
 }
 
 add_overlayfiles() {
 	local file="$1"
-	find /overlay/etc/ -type f | sed \
+	find /overlay/etc/ -type f -o -type l | sed \
 		-e 's,^/overlay/,/,' \
 		-e '\,/META_[a-zA-Z0-9]*$,d' \
 		-e '\,/functions.sh$,d' \