Get benchmarks compiling again
Get benchmarks compiling again

I haven't been running these on commits that shouldn't affect them, so
they've gotten a bit out of sync

sgrif/diesel,cascalheira/diesel,cascalheira/diesel,mcasper/diesel,mcasper/diesel,SoftwareWarlock/diesel,tohou/diesel,sgrif/diesel,SoftwareWarlock/diesel,diesel-rs/diesel,diesel-rs/diesel,tohou/diesel