Update aaa_base to rev 462 via SR 770505
https://build.opensuse.org/request/show/770505
by user oertel + dimstar_suse
- Update to version 84.87+git20200206.ed897a1:
* get_kernel_version: fix for current kernel on s390x (from azouhr)
- Update to version 84.87+git20200206.8d74b0b:
* Fix services entry in /etc/nsswitch.conf [bsc#1162916]
- Make sure glibc is recent enough else nsswitch.conf update
will fail