Update Sunfish SVN to 18

Bug: 175313938
Change-Id: Ifbf039a993977a400f5d8be7523c3c2da3d7b4b5
diff --git a/device.mk b/device.mk
index b83ca90..bd571ea 100644
--- a/device.mk
+++ b/device.mk
@@ -880,7 +880,7 @@
 
 # Increment the SVN for any official public releases
 PRODUCT_PROPERTY_OVERRIDES += \
-	ro.vendor.build.svn=17
+	ro.vendor.build.svn=18
 
 PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/powerhint.json:$(TARGET_COPY_OUT_VENDOR)/etc/powerhint.json