Include Makefile-devel-adds in the release tarball, just in case
somebody creates .devel.
diff --git a/Makefile.in b/Makefile.in
index 040a377..566e702 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -205,6 +205,7 @@
 	INSTALL.txt \
 	LICENSE \
 	Makefile.in \
+	Makefile-devel-adds \
 	README \
 	Readme.Win32 \
 	VERSION \