[packman] swrj01 worker is broken

[Guillaume GARDET]

swrj01 worker is broken. All build fails with: 

[   14s] [30/32] preinstalling aaa_base...
[   14s] /var/run/obs/worker/1/build/build-pkg-rpm: line 179: zstd: command not found
[   14s] [31/32] preinstalling rpm-config-SUSE...
[   14s] /var/run/obs/worker/1/build/build-pkg-rpm: line 179: zstd: command not found
[   14s] [32/32] preinstalling rpm...
[   15s] 
[   15s] initializing rpm db...
[   15s] chroot: failed to run command '/usr/bin/rpmdb': No such file or directory
[   16s] 
[   16s] swrj01 failed "build x265.spec" at Wed Dec  2 03:34:25 UTC 2020.