It's currently not configurable. The reason Awesome Miner disable the watchdog of mining software like Nbminer is because in case of a crash of Nbminer, the Nbminer watchdog would restart the Nbminer process. Awesome Miner will not have any idea of what's going on here and just notice the crash (original process no longer running) and restarts Nbminer. You would end up with two Nbminer processes.

Because Awesome Miner automatically restarts mining software that is crashing, the use of watchdogs built-in the mining software generally causes more problems than they solve.