Update git-merge-one-file-script.
Update git-merge-one-file-script.

With this change, git-merge-one-file-script ceases to smudge
files in the work tree when recording the trivial merge results
(conflicting auto-merge failure case does not touch the work
tree file as before).

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git