dagrt is breaking grudge CI

[thomasgibson]

PR: #12 has broken Grudge (see this log). Specifically, this is the example that's broken: https://github.com/inducer/grudge/blob/main/examples/old_symbolics/dagrt-fusion.py.

If we want Grudge to keep running that example, then dagrt should add grudge examples to its CI.