Update Sunfish SVN to 13

Bug: 163542576
Change-Id: Ia980dd0534d07ae3cd94d232ba3a6b43aff6be31
(cherry picked from commit 2e846ee97fe38ceba4901e89a5129906a2d363c4)
diff --git a/device.mk b/device.mk
index 0213177..ac29c4e 100644
--- a/device.mk
+++ b/device.mk
@@ -878,7 +878,7 @@
 
 # Increment the SVN for any official public releases
 PRODUCT_PROPERTY_OVERRIDES += \
-	ro.vendor.build.svn=12
+	ro.vendor.build.svn=13
 
 # ZRAM writeback
 PRODUCT_PROPERTY_OVERRIDES += \