readline: add hash file

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/readline/readline.hash

@@ -0,0 +1,2 @@
+# Locally calculated after checking pgp signature
+sha256	56ba6071b9462f980c5a72ab0023893b65ba6debb4eeb475d7a563dc65cafd43	readline-6.3.tar.gz