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/stdenv/generic/builder.sh

@@ -0,0 +1,23 @@
+export PATH=
+for i in $initialPath; do
+    if [ "$i" = / ]; then i=; fi
+    PATH=$PATH${PATH:+:}$i/bin
+done
+
+mkdir $out
+
+{
+    echo "export SHELL=$shell"
+    echo "initialPath=\"$initialPath\""
+    echo "defaultNativeBuildInputs=\"$defaultNativeBuildInputs\""
+    echo "defaultBuildInputs=\"$defaultBuildInputs\""
+    echo "$preHook"
+    cat "$setup"
+} > "$out/setup"
+
+# Allow the user to install stdenv using nix-env and get the packages
+# in stdenv.
+mkdir $out/nix-support
+if [ "$propagatedUserEnvPkgs" ]; then
+    printf '%s ' $propagatedUserEnvPkgs > $out/nix-support/propagated-user-env-packages
+fi