More pretty names for Swift api diff generation.
More pretty names for Swift api diff generation.

Reviewers: O4 Material Motion Apple platform reviewers, O2 Material Motion, markwei

Reviewed By: O4 Material Motion Apple platform reviewers, O2 Material Motion, markwei

Tags: #material_motion

Differential Revision: http://codereview.cc/D2099

material-motion/apidiff,material-motion/apidiff,material-motion/apidiff