Bug#915994: spooles FTBFS with multiarchified openmpi >= 3.1.3-3

[Adrian Bunk]

Source: spooles
Version: 2.2-13
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/spooles.html

...
In file included from aggListMPI.c:3:
../spoolesMPI.h:6:10: fatal error: mpi.h: No such file or directory
 #include <mpi.h>
          ^~~~~~~
compilation terminated.
make[5]: *** [makeG:38: aggListMPI.o] Error 1