Add make clean and maintainer-clean to autogen

autogen.sh

@@ -1,4 +1,7 @@
 #!/bin/sh
+make clean
+make maintainer-clean
+
 bs_dir="$(dirname $(readlink -f $0))"
 rm -rf "${bs_dir}"/autom4te.cache
 rm -f "${bs_dir}"/aclocal.m4 "${bs_dir}"/ltmain.sh