Sharing update: take over reshares and thus don't fail

apps/files_sharing/appinfo/update.php

@@ -21,7 +21,7 @@ if (version_compare($installedVersion, '0.3', '<')) {
 			if ($row['permissions'] == 0) {
 				$permissions = OCP\Share::PERMISSION_READ;
 			} else {
-				$permissions = OCP\Share::PERMISSION_READ | OCP\Share::PERMISSION_UPDATE;
+				$permissions = OCP\Share::PERMISSION_READ | OCP\Share::PERMISSION_UPDATE | OCP\Share::PERMISSION_SHARE;
 				if ($itemType == 'folder') {
 					$permissions |= OCP\Share::PERMISSION_CREATE;
 				}