[kernel] remove spec use of isnan isinf for cxx1 (opensuse build)
[kernel] remove spec use of isnan isinf for cxx1 (opensuse build)

radarsat1/siconos,siconos/siconos,siconos/siconos,fperignon/siconos,fperignon/siconos,radarsat1/siconos,radarsat1/siconos,radarsat1/siconos,radarsat1/siconos,fperignon/siconos,fperignon/siconos,siconos/siconos,fperignon/siconos,siconos/siconos