Features (#572)

<!-- Remember that you can run `/merge` to enable auto-merge in the PR
-->

<!-- Remember to modify the changelog. If you don't need to modify it,
you can check the following box.
Instead, if you have already modified it, simply delete the following
line. -->

- [ ] Does not require a CHANGELOG entry

system-parachains/asset-hubs/asset-hub-kusama/Cargo.toml

@@ -156,6 +156,7 @@ runtime-benchmarks = [
 	"polkadot-runtime-common/runtime-benchmarks",
 	"snowbridge-router-primitives/runtime-benchmarks",
 	"sp-runtime/runtime-benchmarks",
+	"system-parachains-constants/runtime-benchmarks",
 	"xcm-builder/runtime-benchmarks",
 	"xcm-executor/runtime-benchmarks",
 	"xcm-runtime-apis/runtime-benchmarks",

system-parachains/constants/Cargo.toml

@@ -35,3 +35,7 @@ std = [
 	"sp-std/std",
 	"xcm/std",
 ]
+runtime-benchmarks = [
+	"kusama-runtime-constants/runtime-benchmarks",
+	"polkadot-runtime-constants/runtime-benchmarks",
+]