[cmake] add -ftemplate-depth=1024 to clang flags when compiling io with serialization
[cmake] add -ftemplate-depth=1024 to clang flags when compiling io with serialization

radarsat1/siconos,fperignon/siconos,siconos/siconos,radarsat1/siconos,siconos/siconos,siconos/siconos-deb,siconos/siconos,siconos/siconos-deb,radarsat1/siconos,siconos/siconos-deb,bremond/siconos,radarsat1/siconos,fperignon/siconos,fperignon/siconos,siconos/siconos-deb,fperignon/siconos,radarsat1/siconos,bremond/siconos,siconos/siconos-deb,bremond/siconos,siconos/siconos-deb,siconos/siconos,bremond/siconos,fperignon/siconos,bremond/siconos