crda: add hash file

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

package/crda/crda.hash

@@ -0,0 +1,2 @@
+# From https://www.kernel.org/pub/software/network/crda/sha256sums.asc
+sha256	2f85da7ab0170b140d6ed62596c8f268d4a7dedecf84cac7182ada979742ff59	crda-3.13.tar.xz