Use location type parameter in `Friendly.t` consistently
Use location type parameter in `Friendly.t` consistently

Summary: In practice this is instantiated to `Loc.t` (see just a few lines below in this file).

Reviewed By: dsainati1

Differential Revision: D10226940

fbshipit-source-id: 2c09b6a4ff981b26a4138fa94d3bc843cf88125d

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow