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/dotnetenv/build-solution.nix

@@ -0,0 +1,85 @@
+{ lib, stdenv, dotnetfx }:
+{ name
+, src
+, baseDir ? "."
+, slnFile
+, targets ? "ReBuild"
+, verbosity ? "detailed"
+, options ? "/p:Configuration=Debug;Platform=Win32"
+, assemblyInputs ? []
+, preBuild ? ""
+, modifyPublicMain ? false
+, mainClassFile ? null
+}:
+
+assert modifyPublicMain -> mainClassFile != null;
+
+stdenv.mkDerivation {
+  inherit name src;
+
+  buildInputs = [ dotnetfx ];
+
+  preConfigure = ''
+    cd ${baseDir}
+  '';
+
+  preBuild = ''
+    ${lib.optionalString modifyPublicMain ''
+      sed -i -e "s|static void Main|public static void Main|" ${mainClassFile}
+    ''}
+    ${preBuild}
+  '';
+
+  installPhase = ''
+    addDeps()
+    {
+	if [ -f $1/nix-support/dotnet-assemblies ]
+	then
+	    for i in $(cat $1/nix-support/dotnet-assemblies)
+	    do
+		windowsPath=$(cygpath --windows $i)
+		assemblySearchPaths="$assemblySearchPaths;$windowsPath"
+
+		addDeps $i
+	    done
+	fi
+    }
+
+    for i in ${toString assemblyInputs}
+    do
+	windowsPath=$(cygpath --windows $i)
+	echo "Using assembly path: $windowsPath"
+
+	if [ "$assemblySearchPaths" = "" ]
+	then
+	    assemblySearchPaths="$windowsPath"
+	else
+	    assemblySearchPaths="$assemblySearchPaths;$windowsPath"
+	fi
+
+	addDeps $i
+    done
+
+    echo "Assembly search paths are: $assemblySearchPaths"
+
+    if [ "$assemblySearchPaths" != "" ]
+    then
+	echo "Using assembly search paths args: $assemblySearchPathsArg"
+	export AssemblySearchPaths=$assemblySearchPaths
+    fi
+
+    mkdir -p $out
+    MSBuild.exe ${toString slnFile} /nologo /t:${targets} /p:IntermediateOutputPath=$(cygpath --windows $out)\\ /p:OutputPath=$(cygpath --windows $out)\\ /verbosity:${verbosity} ${options}
+
+    # Because .NET assemblies store strings as UTF-16 internally, we cannot detect
+    # hashes. Therefore a text files containing the proper paths is created
+    # We can also use this file the propagate transitive dependencies.
+
+    mkdir -p $out/nix-support
+
+    for i in ${toString assemblyInputs}
+    do
+        echo $i >> $out/nix-support/dotnet-assemblies
+    done
+  '';
+}