cli: fix embedding of policy hash

The definition of the default policy hash was moved, but the -X argument
for the go build was not changed accordingly.

(cherry picked from commit b32b43e)

packages/by-name/cli-release/package.nix

@@ -12,6 +12,6 @@
   '';
 
   ldflags = previousAttrs.ldflags ++ [
-    "-X main.DefaultCoordinatorPolicyHash=${builtins.readFile ../../../cli/cmd/assets/coordinator-policy-hash}"
+    "-X github.com/edgelesssys/contrast/cli/cmd.DefaultCoordinatorPolicyHash=${builtins.readFile ../../../cli/cmd/assets/coordinator-policy-hash}"
   ];
 })).cli