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/libraries/mbedtls/default.nix

@@ -0,0 +1,49 @@
+{ lib, stdenv
+, fetchFromGitHub
+
+, cmake
+, ninja
+, perl # Project uses Perl for scripting and testing
+, python3
+
+, enableThreading ? true # Threading can be disabled to increase security https://tls.mbed.org/kb/development/thread-safety-and-multi-threading
+}:
+
+stdenv.mkDerivation rec {
+  pname = "mbedtls";
+  # Auto updates are disabled due to repology listing dev releases as release
+  # versions. See
+  #  * https://github.com/NixOS/nixpkgs/pull/119838#issuecomment-822100428
+  #  * https://github.com/NixOS/nixpkgs/commit/0ee02a9d42b5fe1825b0f7cee7a9986bb4ba975d
+  version = "2.28.0"; # nixpkgs-update: no auto update
+
+  src = fetchFromGitHub {
+    owner = "ARMmbed";
+    repo = "mbedtls";
+    rev = "${pname}-${version}";
+    sha256 = "sha256-VDoIUBaK2e0E5nkwU1u3Wvxc+s6OzBSdIeHsJKJuZ2g=";
+  };
+
+  nativeBuildInputs = [ cmake ninja perl python3 ];
+
+  strictDeps = true;
+
+  postConfigure = lib.optionalString enableThreading ''
+    perl scripts/config.pl set MBEDTLS_THREADING_C    # Threading abstraction layer
+    perl scripts/config.pl set MBEDTLS_THREADING_PTHREAD    # POSIX thread wrapper layer for the threading layer.
+  '';
+
+  cmakeFlags = [ "-DUSE_SHARED_MBEDTLS_LIBRARY=on" ];
+  NIX_CFLAGS_COMPILE = lib.optionals stdenv.cc.isGNU [
+    "-Wno-error=format"
+    "-Wno-error=format-truncation"
+  ];
+
+  meta = with lib; {
+    homepage = "https://tls.mbed.org/";
+    description = "Portable cryptographic and TLS library, formerly known as PolarSSL";
+    license = licenses.asl20;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ fpletz ];
+  };
+}