message: Provide better error context for `cargo build`
diff: @@ -82,7 +82,7 @@ pub fn cargo_build_wasm(
  cmd.arg("--release");
  }
  cmd.arg("--target").arg("wasm32-unknown-unknown");
  - child::run(log, cmd, "cargo build").context("Compiling your crate to WebAssembly")?;
  + child::run(log, cmd, "cargo build").context("Compiling your crate to WebAssembly failed")?;
  Ok(())
  }
  