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/setup-hooks/move-sbin.sh

@@ -0,0 +1,19 @@
+# This setup hook, for each output, moves everything in $output/sbin
+# to $output/bin, and replaces $output/sbin with a symlink to
+# $output/bin.
+
+fixupOutputHooks+=(_moveSbin)
+
+_moveSbin() {
+    if [ "${dontMoveSbin-}" = 1 ]; then return; fi
+    if [ ! -e "$prefix/sbin" -o -L "$prefix/sbin" ]; then return; fi
+    echo "moving $prefix/sbin/* to $prefix/bin"
+    mkdir -p $prefix/bin
+    shopt -s dotglob
+    for i in $prefix/sbin/*; do
+        mv "$i" $prefix/bin
+    done
+    shopt -u dotglob
+    rmdir $prefix/sbin
+    ln -s bin $prefix/sbin
+}