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/polar/Gemfile.lock

@@ -0,0 +1,27 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ffi (1.15.0)
+    google-protobuf (3.15.6)
+    libusb (0.6.4)
+      ffi (~> 1.0)
+      mini_portile2 (~> 2.1)
+    mini_portile2 (2.5.0)
+    nokogiri (1.11.2)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    racc (1.5.2)
+    rubyserial (0.6.0)
+      ffi (~> 1.9, >= 1.9.3)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  google-protobuf
+  libusb
+  nokogiri
+  rubyserial
+
+BUNDLED WITH
+   2.1.4