update travis to use latest compilers.
update travis to use latest compilers.

OpenMusicKontrollers/synthpod,OpenMusicKontrollers/synthpod,OpenMusicKontrollers/chimaerad,OpenMusicKontrollers/patchmatrix,OpenMusicKontrollers/moony.lv2,OpenMusicKontrollers/moony.lv2,OpenMusicKontrollers/chimaerad,OpenMusicKontrollers/varchunk,OpenMusicKontrollers/eteroj.lv2,OpenMusicKontrollers/orbit.lv2,OpenMusicKontrollers/patchmatrix,OpenMusicKontrollers/patchmatrix,OpenMusicKontrollers/moony.lv2,OpenMusicKontrollers/chimaerad,OpenMusicKontrollers/moony.lv2,OpenMusicKontrollers/eteroj.lv2,OpenMusicKontrollers/synthpod,OpenMusicKontrollers/chimaerad,OpenMusicKontrollers/orbit.lv2,OpenMusicKontrollers/synthpod,OpenMusicKontrollers/patchmatrix,OpenMusicKontrollers/chimaerad,OpenMusicKontrollers/chimaerad,OpenMusicKontrollers/moony.lv2,OpenMusicKontrollers/moony.lv2,OpenMusicKontrollers/synthpod