srml: system: add kill_prefix (#3729)

* srml: system: add kill_prefix

* node: bump spec_version

substrate/node/runtime/src/lib.rs

@@ -84,8 +84,8 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to equal spec_version. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 166,
-	impl_version: 166,
+	spec_version: 167,
+	impl_version: 167,
 	apis: RUNTIME_API_VERSIONS,
 };