exa2pro/starpu-max: porting work to Maxeler DFE @ 1c22dcd1a8e71e2a88f936d0b5535de46be0c163

Nathalie Furmento 681f60a3ef mpi: do not fail when needed workers are unavailable		%!s(int64=9) %!d(string=hai) anos
..
my_interface.c	c537920e32 mpi/examples/user_datatype/my_interface.c: improve error message	%!s(int64=10) %!d(string=hai) anos
my_interface.h	1ccc854b64 mpi/examples: add example which defines a MPI datatype for a StarPU user-defined interface	%!s(int64=10) %!d(string=hai) anos
user_datatype.c	681f60a3ef mpi: do not fail when needed workers are unavailable	%!s(int64=9) %!d(string=hai) anos