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/os-specific/darwin/print-reexports/setup-hook.sh

@@ -0,0 +1,19 @@
+fixupOutputHooks+=('checkTbdReexports')
+
+checkTbdReexports() {
+  local dir="$1"
+
+  while IFS= read -r -d $'\0' tbd; do
+    echo "checkTbdRexports: checking re-exports in $tbd"
+    while read -r target; do
+      local expected="${target%.dylib}.tbd"
+      if ! [ -e "$expected" ]; then
+        echo -e "Re-export missing:\n\t'$target'\n\t(expected '$expected')"
+        echo -e "While processing\n\t'$tbd'"
+        exit 1
+      else
+        echo "Re-exported target '$target' ok"
+      fi
+    done < <(print-reexports "$tbd")
+  done < <(find $prefix -type f -name '*.tbd' -print0)
+}