S/390 builds failing in CI

[Andrew Haley]

Like this:

https://github.com/theRealAph/jdk/runs/2885812815

Run sudo apt-get install gcc-10-s390x-linux-gnu=10.2.0-5ubuntu1~20.04cross1 g++-10-s390x-linux-gnu=10.2.0-5ubuntu1~20.04cross1

The following packages have unmet dependencies:
 g++-10-s390x-linux-gnu : Depends: gcc-10-s390x-linux-gnu-base (= 10.2.0-5ubuntu1~20.04cross1) but 10.3.0-1ubuntu1~20.04cross1 is to be installed
 gcc-10-s390x-linux-gnu : Depends: cpp-10-s390x-linux-gnu (= 10.2.0-5ubuntu1~20.04cross1) but 10.3.0-1ubuntu1~20.04cross1 is to be installed
                          Depends: gcc-10-s390x-linux-gnu-base (= 10.2.0-5ubuntu1~20.04cross1) but 10.3.0-1ubuntu1~20.04cross1 is to be installed
E: Unable to correct problems, you have held broken packages.
Error: Process completed with exit code 100.

Nothing to do with my changes, I think.

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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