kmod: add hash file

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kmod/kmod.hash

@@ -0,0 +1,2 @@
+# From https://www.kernel.org/pub/linux/utils/kernel/kmod/sha256sums.asc
+sha256	e16e57272b54acb219c465b334715cfdddb5d97ff5d8948d4830ca1a372a868e	kmod-18.tar.xz