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/development/perl-modules/expression-generator/full-requirements.sh

@@ -0,0 +1,21 @@
+#! /bin/sh
+
+source lib-cache.sh;
+
+print_requirements () {
+    module_name="$1";
+
+    ./requirements.sh "$module_name" | while read; do
+        echo "$REPLY";
+        print_reqs_cache "$REPLY";
+    done | sort | uniq
+};
+
+print_reqs_cache () {
+    module_name="$1";
+    module_basename="${module_name//::/-}";
+
+    cached_output print_requirements "$module_basename" "$module_name" "full.deps";
+};
+
+print_reqs_cache "$@";