Update everything to latest wasm-builder (#1843)

This fixes some incompatibilities between wasm-builder and wasm-builder-runner.

polkadot/runtime/kusama/Cargo.toml

@@ -82,7 +82,7 @@ sp-trie = { git = "https://github.com/paritytech/substrate", branch = "master" }
 serde_json = "1.0.41"
 
 [build-dependencies]
-wasm-builder-runner = { package = "substrate-wasm-builder-runner", version = "1.0.6" }
+wasm-builder-runner = { package = "substrate-wasm-builder-runner", version = "2.0.0" }
 
 [features]
 default = ["std"]

polkadot/runtime/kusama/build.rs

@@ -1,25 +1,25 @@
 // Copyright 2019-2020 Parity Technologies (UK) Ltd.
 // This file is part of Polkadot.
 
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 
 // You should have received a copy of the GNU General Public License
-// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
 
 use wasm_builder_runner::WasmBuilder;
 
 fn main() {
 	WasmBuilder::new()
 		.with_current_project()
-		.with_wasm_builder_from_crates("2.0.0")
+		.with_wasm_builder_from_crates("2.0.1")
 		.import_memory()
 		.export_heap_base()
 		.build()