package/autoconf: add hash for license files

Signed-off-by: Adam Duskett <Aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/autoconf/autoconf.hash

@@ -1,2 +1,4 @@
 # Locally calculated after checking pgp signature
 sha256	64ebcec9f8ac5b2487125a86a7760d2591ac9e1d3dbd59489633f9de62a57684  autoconf-2.69.tar.xz
+sha256	8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  COPYINGv3
+sha256	23ed0b84fa023bfa33433b498192cd08a3bfb1f4864a8ed791a84f3eb48b2dd2  COPYING.EXCEPTION