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This patch handles dependencies specified by the `depend` clause on an OpenMP target construct. It does this much the same way clang does it by materializing an OpenMP `task` that is tagged with the dependencies. The following functions are relevant to this patch - 1) `createTarget` - This function itself is largely unchanged except that it now accepts a vector of `DependData` objects that it simply forwards to `emitTargetCall` 2) `emitTargetCall` - This function has changed now to check if an outer target-task needs to be materialized (i.e if `target` construct has `nowait` or has `depend` clause). If yes, it calls `emitTargetTask` to do all the heavy lifting for creating and dispatching the task. 3) `emitTargetTask` - Bulk of the change is here. See the large comment explaining what it does at the beginning of this function