project: Set config option to skip lfs smudge filter

During sync, repo runs `git read-tree --reset -u -v HEAD` which causes
git-lfs's smudge filter to run. However this fails because git-lfs does
not work with bare repositories.

Add lfs.filter configuration to the project config as suggested in the
comments on the upstream git-lfs client issue [1]. This prevents the
smudge filter from running, and the sync completes successfully.

For any projects that have LFS objects, `git lfs pull` must be executed.

[1] https://github.com/github/git-lfs/issues/1422

Bug: Issue 224
Change-Id: I091ff37998131e2e6bbc59aa37ee352fe12d7fcd