Resume fails with `--fast`

[myreen]

I've noticed that Holmake --fast fails in case suspend/Resume is used. This is quite inconvenient.

Here's a simple reproduction of the error. Have a file fooScript.sml with the content:

Theory foo
Ancestors
  list

Theorem lemma:
  ∀n. n < n + 1:num
Proof
  Cases
  >- fs []
  >- suspend "bar"
QED

Resume lemma[bar]:
  simp []
QED

Finalise lemma

With Holmake fooTheory this builds fine.

With Holmake --fast fooTheory this file fails to build. The error is "No suspension with name lemma".

[xrchz]

The proposal in #1883 would likely solve this too

[xrchz]

Solved as part of #1912