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/build-managers/msbuild/create-deps.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p jq -p xmlstarlet -p curl
+set -euo pipefail
+
+cat << EOL
+{ fetchurl }: [
+EOL
+
+mapfile -t repos < <(
+    xmlstarlet sel -t -v 'configuration/packageSources/add/@value' -n NuGet.config |
+        while IFS= read index
+        do
+            curl --compressed -fsL "$index" | \
+                jq -r '.resources[] | select(."@type" == "PackageBaseAddress/3.0.0")."@id"'
+        done
+    )
+
+find .packages fake-home/.nuget/packages -name \*.nupkg -printf '%P\n' | sort -u |
+    while IFS= read file
+    do
+        packagedir=$(dirname $file)
+        version=$(basename $packagedir)
+        package=$(dirname $packagedir)
+
+        found=false
+        for repo in "${repos[@]}"
+        do
+            url="$repo$package/$version/$package.$version.nupkg"
+            if curl -fsL "$url" -o /dev/null
+            then
+                found=true
+                break
+            fi
+        done
+
+        if ! $found
+        then
+            echo "couldn't find $package $version" >&2
+            exit 1
+        fi
+
+        sha256=$(nix-prefetch-url "$url" 2>/dev/null)
+        cat << EOL
+  {
+    name = "$package";
+    version = "$version";
+    src = fetchurl {
+      url = "$url";
+      sha256 = "$sha256";
+    };
+  }
+EOL
+    done
+
+cat << EOL
+]
+EOL