autoconf: Provide an autogen.sh

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/autogen.sh b/autogen.sh
new file mode 100755 (executable)
index 0000000..6090f60
--- /dev/null
+++ b/autogen.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+autoconf
+autoheader