www/drupal7: update 7.78 -> 7.80, fix security vulnerability

PR: 255417
MFH: 2021Q2
Security: CVE-2020-13672

		https://www.drupal.org/sa-core-2021-002

Changes: https://www.drupal.org/project/drupal/releases/7.80
Approved by: joneum (maintainer timeout)