By Yew Lun Tian and David Ljunggren Reuters * Death penalty comes after Huawei exec arrested in Canada * Canada condemns ruling against Robert Schellenberg * China tried two other Canadians for spying, verdicts due * Canada says two cases linked to Huawei exec, China denies it (Adds details of Meng's court proceedings) BEIJING/OTTAWA, Aug 10 (Reuters) - A Chinese court on Tuesday upheld a Canadian man's death sentence for drug smuggling, prompting condemnation from Ottawa, a day before another court is due to rule on the case of a Canadian accused of spying. The court proceedings for the two...