package/autoconf-archive: add hash for license file

Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/autoconf-archive/autoconf-archive.hash

@@ -1,2 +1,4 @@
 # Computed locally
 sha256 17195c833098da79de5778ee90948f4c5d90ed1a0cf8391b4ab348e2ec511e3f  autoconf-archive-2019.01.06.tar.xz
+sha256 e6037104443f9a7829b2aa7c5370d0789a7bda3ca65a0b904cdc0c2e285d9195  COPYING
+sha256 23ed0b84fa023bfa33433b498192cd08a3bfb1f4864a8ed791a84f3eb48b2dd2  COPYING.EXCEPTION