add right compiler to travis conf
add right compiler to travis conf

attempt n°2  to fix travis build
whitef0x0/nodeforms,whitef0x0/medforms,whitef0x0/tellform,whitef0x0/medforms,whitef0x0/medforms,whitef0x0/tellform,whitef0x0/nodeforms,whitef0x0/tellform,whitef0x0/nodeforms