[Dune] dune-common, cmake/scripts/main77.cc is missing

[Ruth Schoebel]

Dear DUNE developers,
the installation of the latest dune-common version from github fails,
except I add cmake/scripts/main77.cc. I guess someone just delete or
rename it by accident. For me everything is fine and works but please
fix that littel bug.
Greetings Ruth


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Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
Prof. Dr. Sebastian M. Schmidt
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