Gracefully handle another run creating latest link

Review Request #1396 - Created Nov. 24, 2014 and submitted

Information
David Taylor
pants
827
7bae889...
Reviewers
pants-reviews
benjyw, patricklaw, zundel

Gracefully handle a race with another run creating or removing the latest link (which can happen with concurrent runs).

Concurrent runs ~8µs apart.
https://travis-ci.org/pantsbuild/pants/builds/41989058

Patrick Lawson
Eric Ayers
David Taylor
Review request changed

Status: Closed (submitted)

Change Summary:

a453ca8ccbdcc08f3f530abb878ea2b9484745e3
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