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/tools/misc/html-proofer/Gemfile.lock

@@ -0,0 +1,39 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    ethon (0.12.0)
+      ffi (>= 1.3.0)
+    ffi (1.14.2)
+    html-proofer (3.18.8)
+      addressable (~> 2.3)
+      mercenary (~> 0.3)
+      nokogumbo (~> 2.0)
+      parallel (~> 1.3)
+      rainbow (~> 3.0)
+      typhoeus (~> 1.3)
+      yell (~> 2.0)
+    mercenary (0.4.0)
+    mini_portile2 (2.5.0)
+    nokogiri (1.11.1)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    nokogumbo (2.0.4)
+      nokogiri (~> 1.8, >= 1.8.4)
+    parallel (1.20.1)
+    public_suffix (4.0.6)
+    racc (1.5.2)
+    rainbow (3.0.0)
+    typhoeus (1.4.0)
+      ethon (>= 0.9.0)
+    yell (2.2.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  html-proofer
+
+BUNDLED WITH
+   2.1.4