WeightInfo for System, Timestamp, and Utility (#6868)

* initial updates to system

* fix compile

* Update writer.rs

* update weights

* finish system weights

* timestamp weights

* utility weight

* Fix overflow in weight calculations

* add back weight notes

* Update for whitelisted benchmarks

* add trait bounds

* Revert "add trait bounds"

This reverts commit 12b08b7189aa3969f96fa19b211a370860fdb240.

* Update weights for unaccounted for read

substrate/frame/timestamp/src/default_weights.rs

@@ -0,0 +1,35 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2017-2020 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 2.0.0-rc5
+
+#![allow(unused_parens)]
+
+use frame_support::weights::{Weight, constants::RocksDbWeight as DbWeight};
+
+impl crate::WeightInfo for () {
+	// WARNING! Some components were not used: ["t"]
+	fn set() -> Weight {
+		(9133000 as Weight)
+			.saturating_add(DbWeight::get().reads(2 as Weight))
+			.saturating_add(DbWeight::get().writes(1 as Weight))
+	}
+	// WARNING! Some components were not used: ["t"]
+	fn on_finalize() -> Weight {
+		(5915000 as Weight)
+	}
+}