uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/tools/wasm-pack/default.nix

@@ -0,0 +1,45 @@
+{ lib, stdenv
+, fetchFromGitHub
+, rustPlatform
+, pkg-config
+, libressl
+, curl
+, Security
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "wasm-pack";
+  version = "0.10.2";
+
+  src = fetchFromGitHub {
+    owner = "rustwasm";
+    repo = "wasm-pack";
+    rev = "v${version}";
+    sha256 = "sha256-nhO/SLeJTq2viDqsJCRNLbgjyDKRli3RWExUNzKT9ug=";
+  };
+
+  cargoSha256 = "sha256-6qrCHpg92IRPsf/dK6xcLGX8BLmqox3vgLRqsV4ubsY=";
+
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [
+    # LibreSSL works around segfault issues caused by OpenSSL being unable to
+    # gracefully exit while doing work.
+    # See: https://github.com/rustwasm/wasm-pack/issues/650
+    libressl
+  ] ++ lib.optionals stdenv.isDarwin [ curl Security ];
+
+  # Needed to get openssl-sys to use pkg-config.
+  OPENSSL_NO_VENDOR = 1;
+
+  # Most tests rely on external resources and build artifacts.
+  # Disabling check here to work with build sandboxing.
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A utility that builds rust-generated WebAssembly package";
+    homepage = "https://github.com/rustwasm/wasm-pack";
+    license = with licenses; [ asl20 /* or */ mit ];
+    maintainers = [ maintainers.dhkl ];
+  };
+}