add autogen.sh to boostrap build process

diff --git a/autogen.sh b/autogen.sh
new file mode 100755 (executable)
index 0000000..427394a
--- /dev/null
+++ b/autogen.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+autoreconf -fiv
+rm -Rf autom4te.cache