Bug#1003079: scotch v7 MPI dgord dgpart tests fail

[Drew Parsons]

Package: scotch
Version: 7.0.0-1exp1
Followup-For: Bug #1003079

For reference, the dgord and dgpart tests are passing on
upstream CI testing, e.g.
https://gitlab.inria.fr/scotch/scotch/-/jobs/1649760

Likely our problem is related to the choice of build flags.

Upstream tests use

-DSCOTCH_GITLAB_SEPARATOR -DCOMMON_FILE_COMPRESS_GZ
-DCOMMON_FILE_COMPRESS_BZ2 -DSCOTCH_RENAME -O0 -g -fPIC
-DCOMMON_FILE_COMPRESS_LZMA -DCOMMON_PTHREAD -DSCOTCH_PTHREAD
-DSCOTCH_PTHREAD_NUMBER=2 -DCOMMON_RANDOM_FIXED_SEED
-DSCOTCH_DEBUG_ALL -DSCOTCH_METIS_VERSION=5 -DSCOTCH_RENAME
-DSCOTCH_PTSCOTCH