Re-enable clang-tidy
Re-enable clang-tidy

That was disabled due to some issues in glog, but we're not
including that anymore.

Signed-off-by: Henner Zeller <e393654266408b751fd8ad27b99ca78813d38e23@google.com>

chipsalliance/verible,chipsalliance/verible,chipsalliance/verible,chipsalliance/verible,chipsalliance/verible