Bug#844706: libssl1.1 needs Breaks on salt-common

[Adrian Bunk]

Package: libssl1.1
Version: 1.1.0c-1
Severity: serious
Control: block 827061 by -1
Control: block -1 by 843871

libssl1.1 needs a Breaks on salt-common versions without the fix
for #843871 to avoid breakages for users upgrading from jessie.