[ci] Add coinor-csdp Debian package (needed by coq-validsdp)
[ci] Add coinor-csdp Debian package (needed by coq-validsdp)

mattam82/coq-opam-archive,coq/opam-coq-archive,gmalecha/opam-coq-archive,mattam82/coq-opam-archive,gmalecha/opam-coq-archive,mattam82/coq-opam-archive,gmalecha/opam-coq-archive