Update aaa_base to version 84.87+git20210317.2c04190 / rev 478 via SR 879700
https://build.opensuse.org/request/show/879700
by user oertel + dimstar_suse
- Update to version 84.87+git20210317.2c04190:
* Don't rely on external dirname utility, but use ${d:h} tcsh expression.
* Enable locking feature of tcsh history file handling
* Add tcsh xd alias as well.
* Add ash xd() function as well.
* Add new function xd() "jump to the directory of a file"