[mobile-broadband-provider-info] us: add "pta" APN for AT&T (bgo #709874)

[Thomas Haller <thaller src gnome org>]

commit c9488856956311c5a0376bbfc4c0171889cb1a13
Author: Ben Chan <benchan chromium org>
Date:   Thu Oct 10 17:58:12 2013 -0700

    us: add "pta" APN for AT&T (bgo #709874)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709874
    
    Signed-off-by: Thomas Haller <thaller redhat com>

 serviceproviders.xml |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/serviceproviders.xml b/serviceproviders.xml
index a8397d4..b74aa61 100644
--- a/serviceproviders.xml
+++ b/serviceproviders.xml
@@ -10423,6 +10423,11 @@ conceived.
                                <usage type="internet"/>
                                <name>Data Connect (old)</name>
                        </apn>
+                       <apn value="pta">
+                               <plan type="postpaid"/>
+                               <usage type="internet"/>
+                               <name>LTE</name>
+                       </apn>
                </gsm>
        </provider>
        <provider>