devgeantv: update ROOT
Trying to build this ROOT on the platforms of devgeantv: https://lcgapp-services.cern.ch/spi-jenkins/job/lcg_nightly_special_matrix/1111/console
Trying to build this ROOT on the platforms of devgeantv: https://lcgapp-services.cern.ch/spi-jenkins/job/lcg_nightly_special_matrix/1111/console