cmd/eg, godoc/redirect: update remaining code.google.com links

Change-Id: I67da9e0c0c511c19e5b5296fbcf46f641273a7bb
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/1515
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/cmd/eg/eg.go b/cmd/eg/eg.go
index bee24514..0d9cf91 100644
--- a/cmd/eg/eg.go
+++ b/cmd/eg/eg.go
@@ -1,6 +1,6 @@
 // The eg command performs example-based refactoring.
 // For documentation, run the command, or see Help in
-// code.google.com/p/go.tools/refactor/eg.
+// golang.org/x/tools/refactor/eg.
 package main // import "golang.org/x/tools/cmd/eg"
 
 import (