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/tools/redis-dump/Gemfile.lock

@@ -0,0 +1,21 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    drydock (0.6.9)
+    redis (4.1.0)
+    redis-dump (0.4.0)
+      drydock (>= 0.6.9)
+      redis (>= 4.0)
+      uri-redis (>= 0.4.0)
+      yajl-ruby (>= 0.1)
+    uri-redis (0.4.2)
+    yajl-ruby (1.4.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  redis-dump
+
+BUNDLED WITH
+   2.1.4