[tests] fix missing library path for C-language tests (non-rpath build)
[tests] fix missing library path for C-language tests (non-rpath build)

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