Update Redbull SVN to 21

Bug: 175313938
Change-Id: Iebe2d8c74c178dc561177e7c9de0d8538d5ac9a9
diff --git a/device-common.mk b/device-common.mk
index 9a0b03b..3e71ee4 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -839,7 +839,7 @@
 # Increment the SVN for any official public releases
 ifeq ($(PRODUCT_DEVICE_SVN_OVERRIDE),)
 PRODUCT_PROPERTY_OVERRIDES += \
-	ro.vendor.build.svn=20
+	ro.vendor.build.svn=21
 endif
 
 # Enable iwlan service logging for debug