travis: radeonsi and radv require LLVM 7.0

Fixes: 3fbdcd942fe ("amd: remove support for LLVM 6.0")
Cc: Marek Olšák <marek.olsak@amd.com>
Cc: Jan Vesely <jan.vesely@rutgers.edu>
Cc: Andres Gomez <agomez@igalia.com>
Cc: Dylan Baker <dylan@pnwbakers.com>
Signed-off-by: Rhys Kidd <rhyskidd@gmail.com>
Acked-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
1 file changed