Bump SVN to 3 for AT&T final build
bug: 140319439
(cherry picked from commit c253b048250b44f71620c03f166875fbe00c7095)

Change-Id: I611cf1c8008d27b9f6abb8a8918543e98e98008f
diff --git a/device.mk b/device.mk
index e60136d..af5b5c6 100644
--- a/device.mk
+++ b/device.mk
@@ -933,7 +933,7 @@
 
 # Increment the SVN for any official public releases
 PRODUCT_PROPERTY_OVERRIDES += \
-	ro.vendor.build.svn=6
+	ro.vendor.build.svn=3
 
 PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/powerhint.json:$(TARGET_COPY_OUT_VENDOR)/etc/powerhint.json