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/darwin/portable-libsystem.sh

@@ -0,0 +1,12 @@
+# Make /nix/store/...-libSystem “portable” for static built binaries.
+# This just rewrites everything in $1/bin to use the
+# /usr/lib/libSystem.B.dylib that is provided on every macOS system.
+
+fixupOutputHooks+=('fixLibsystemRefs $prefix')
+
+fixLibsystemRefs() {
+  if [ -d "$1/bin" ]; then
+      find "$1/bin" -exec \
+        install_name_tool -change @libsystem@ /usr/lib/libSystem.B.dylib {} \;
+  fi
+}