[Services] Uhh implement IPC result header which apparently libctru's apt code nees

include/ipc.hpp

@@ -0,0 +1,9 @@
+#pragma once
+#include <cstdint>
+
+namespace IPC {
+	constexpr std::uint32_t responseHeader(std::uint32_t commandID, std::uint32_t normalResponses, std::uint32_t translateResponses) {
+		// TODO: Maybe validate the response count stuff fits in 6 bits
+		return (commandID << 16) | (normalResponses << 6) | translateResponses;
+	}
+}