lib/wasm works with no_std

lib/wasm/src/code_translator.rs

@@ -34,6 +34,9 @@ use std::collections::{HashMap, hash_map};
 use environ::{FuncEnvironment, GlobalValue};
 use std::{i32, u32};
 
+// this is for no_std builds, but has no affect on regular builds
+use std::vec::Vec;
+
 /// Translates wasm operators into Cretonne IL instructions. Returns `true` if it inserted
 /// a return.
 pub fn translate_operator<FE: FuncEnvironment + ?Sized>(