zsh: add hash for license file

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/zsh/zsh.hash

@@ -3,3 +3,5 @@ md5	dfe156fd69b0d8d1745ecf6d6e02e047	zsh-5.4.2.tar.gz
 # Calculated based on the hash above and after checking signature
 # http://www.zsh.org/pub/zsh-5.4.2.tar.gz.asc
 sha256	957bcdb2c57f64c02f673693ea5a7518ef24b6557aeb3a4ce222cefa6d74acc9	zsh-5.4.2.tar.gz
+# Locally calculated
+sha256	d06fdf3ef9b1ec69d6b9e170b0a9516fbad3523261ff1668bde3bfea6e0ef5f5  LICENCE