exa2pro/starpu-max: porting work to Maxeler DFE @ bbb022d1ba44642daa6e11fbc5883afe1719e46c

Antoine JEGO ff884d2afe c example ; check the arity to throw error if not at least binary reduction tree		%!s(int64=5) %!d(string=hai) anos
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mpi_redux.c	617bbdf1a4 fix mode for redux codelet TODO : put in the documentation that reduction codeelet should be RW\|COMMUTE ?	%!s(int64=5) %!d(string=hai) anos
mpi_redux_tree.c	ff884d2afe c example ; check the arity to throw error if not at least binary reduction tree	%!s(int64=5) %!d(string=hai) anos