openssh: mention release announcement in hash file

Also, add sha1 hash from the announcement.

Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/openssh/openssh.hash

@@ -1,2 +1,4 @@
 # Locally calculated after checking pgp signature
+# Also from http://www.openssh.com/txt/release-6.7 (sha256 is base64 encoded)
+sha1	14e5fbed710ade334d65925e080d1aaeb9c85bf6	openssh-6.7p1.tar.gz
 sha256	b2f8394eae858dabbdef7dac10b99aec00c95462753e80342e530bbb6f725507	openssh-6.7p1.tar.gz