Fix local-clobbering iterators in phabricator/
Summary:
These are the issues identified by the linter in D2052. I don't think any cause bugs, but they are all reasonable errors to raise and the linter correctly
detected that they are suspicious.
Test Plan: Mostly inspection.
Reviewers: vrana, btrahan
Reviewed By: vrana
CC: aran, epriestley
Differential Revision: https://secure.phabricator.com/D2053