do not ship autogen.sh in the tarball

Makefile.am

diff --git a/Makefile.am b/Makefile.am
index 4d22d77..cabd857 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,5 @@
-EXTRA_DIST = autogen.sh
+EXTRA_DIST =
+CLEANFILES =
 ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
 AM_MAKEFLAGS = --no-print-directory
 
@@ -17,8 +18,6 @@
 	-Wl,--gc-sections \
 	-Wl,--as-needed
 
-CLEANFILES =
-
 LIBABC_CURRENT=2
 LIBABC_REVISION=0
 LIBABC_AGE=2