linkedin: Update to new endpoint

LinkedIn API documentation states that this are the correct URLs:
https://developer.linkedin.com/docs/oauth2

Fixes #253

Change-Id: I4fe292a1d85d73e184adf6fe6b23af6eb47d8c23
Reviewed-on: https://go-review.googlesource.com/114355
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/linkedin/linkedin.go b/linkedin/linkedin.go
index b619f93..62d1de8 100644
--- a/linkedin/linkedin.go
+++ b/linkedin/linkedin.go
@@ -11,6 +11,6 @@
 
 // Endpoint is LinkedIn's OAuth 2.0 endpoint.
 var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.linkedin.com/uas/oauth2/authorization",
-	TokenURL: "https://www.linkedin.com/uas/oauth2/accessToken",
+	AuthURL:  "https://www.linkedin.com/oauth/v2/authorization",
+	TokenURL: "https://www.linkedin.com/oauth/v2/accessToken",
 }