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/build-support/dotnet/fetchnuget/default.nix

@@ -0,0 +1,43 @@
+{ fetchurl, buildDotnetPackage, unzip }:
+
+attrs @
+{ pname
+, version
+, url ? "https://www.nuget.org/api/v2/package/${pname}/${version}"
+, sha256 ? ""
+, md5 ? ""
+, ...
+}:
+if md5 != "" then
+  throw "fetchnuget does not support md5 anymore, please use sha256"
+else
+  buildDotnetPackage ({
+    src = fetchurl {
+      inherit url sha256;
+      name = "${pname}.${version}.zip";
+    };
+
+    sourceRoot = ".";
+
+    nativeBuildInputs = [ unzip ];
+
+    dontBuild = true;
+
+    preInstall = ''
+      function traverseRename () {
+        for e in *
+        do
+          t="$(echo "$e" | sed -e "s/%20/\ /g" -e "s/%2B/+/g")"
+          [ "$t" != "$e" ] && mv -vn "$e" "$t"
+          if [ -d "$t" ]
+          then
+            cd "$t"
+            traverseRename
+            cd ..
+          fi
+        done
+      }
+
+      traverseRename
+   '';
+  } // attrs)