Fix import line.

Change-Id: I079f49d63e665e973aa44efb4ef0302da1794295

populate/repotree.go

diff --git a/populate/repotree.go b/populate/repotree.go
index 94f068c..7be46eb 100644
--- a/populate/repotree.go
+++ b/populate/repotree.go
@@ -28,7 +28,7 @@
 	git "github.com/libgit2/git2go"
 
 	"github.com/google/slothfs/gitiles"
-	"github.com/hanwen/gitfs/manifest"
+	"github.com/google/slothfs/manifest"
 )
 
 // fileInfo holds data files contained in the git repository within a