package/ncurses: add license hash

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ncurses/ncurses.hash

@@ -1,2 +1,4 @@
 # Locally calculated after checking pgp signature
 sha256	aa057eeeb4a14d470101eff4597d5833dcef5965331be3528c08d99cebaa0d17	ncurses-6.1.tar.gz
+# Locally computed
+sha256 3c7bc1dd475a5e5dcc7bdf13268a0313ff69e3765689444eb95b5893f61b3d1e  README