Homestyx hydra

R1:980367452522

Extract variable type information from pht() calls

Summary:
Ref T5267. When extrating data from `pht()` calls, also extract the argument types and export them into the map so they can be used by consumers.

We recognize plurals (`phutil_count()`, `new PhutilNumber`) and genders (`phutil_person()`). We'll need to annotate the codebase for those, since they're currently runtime-only.

Test Plan:
Rebuilt extraction maps, got data like this (note "number" type annotation).

```
"Scaling pool \"%s\" up to %s…
Repository: R1 hydra
Commit Date: Nov 8 2016