package/c-ares: add hash

[Peter: verify against pgp signature]
Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/c-ares/c-ares.hash

@@ -0,0 +1,2 @@
+# Locally calculated after checking pgp signature
+sha256 3d701674615d1158e56a59aaede7891f2dde3da0f46a6d3c684e0ae70f52d3db c-ares-1.10.0.tar.gz