clone: Use DirCacheCheckout

This simple change lets us get rid of WorkDirCheckout from JGit,
and all of its supporting code.

Change-Id: I1a5aabe9ab4a2b156fd37cc7e9ededb4ed70f53a
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
1 file changed