R1:271e104c7ea4

Update DivinerAtomController for a long-ago change to the docblock parser API

Summary: Ref T13505. See that task for discussion.

Test Plan: Ran `diviner generate` locally, found a page fataling on this `strlen()`, applied patch, got a sketchy but not-broken page.

Maniphest Tasks: T13505

Differential Revision: https://secure.phabricator.com/D21061