Refactor executables to separate crates

ext/src/main.rs

@@ -0,0 +1,23 @@
+extern crate parity_wasm;
+extern crate pwasm_utils as utils;
+extern crate logger;
+
+use std::env;
+
+fn main() {
+
+	logger::init_log();
+
+	let args = env::args().collect::<Vec<_>>();
+	if args.len() != 3 {
+		println!("Usage: {} input_file.wasm output_file.wasm", args[0]);
+		return;
+	}
+
+	let module = utils::externalize(
+		parity_wasm::deserialize_file(&args[1]).expect("Module to deserialize ok"),
+		vec!["_free", "_malloc", "_memcpy", "_memset", "_memmove"],
+	);
+
+	parity_wasm::serialize_to_file(&args[2], module).expect("Module to serialize ok");
+}