babeld: Include babel_main.h in noinst_HEADERS.

babeld wouldn't build in a dist tarball without this.

From: Denis Ovsienko <infrastation@yandex.ru>
Signed-off-by: Juliusz Chroboczek <jch@pps.jussieu.fr>
[fixed up git message]
Signed-off-by: David Lamparter <equinox@diac24.net>
1 file changed