mksourcepkg is not getting the tag right by itself, so recording it in the
Makefile explicitly for now
diff --git a/.hgtags b/.hgtags
index cc9078a..269f8ec 100644
--- a/.hgtags
+++ b/.hgtags
@@ -74,3 +74,4 @@
 0a8aae575cdddbf3d133fcb4eed91080e3fe41f3 v2.5.2c1
 7f7add8a072272b7204ff464b04a3a6f3ab77dea v2.5.1c1
 2fa9ba9cfa23cefd0f05345c0ed034dcaa719a39 v2.5.1c1
+728086143ce3d953d39eca988b68e9aeec26a8e4 v2.5.2c1