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/ruby-modules/testing/driver.nix

@@ -0,0 +1,20 @@
+/*
+Run with:
+nix-build -E 'with import <nixpkgs> { }; callPackage ./test.nix {}' --show-trace; and cat result
+
+Confusingly, the ideal result ends with something like:
+error: build of ‘/nix/store/3245f3dcl2wxjs4rci7n069zjlz8qg85-test-results.tap.drv’ failed
+*/
+{ writeText, lib, callPackage, testFiles, ruby }@defs:
+let
+  testTools = rec {
+    test = import ./testing.nix;
+    stubs = import ./stubs.nix defs;
+    should = import ./assertions.nix { inherit test lib; };
+  };
+
+  tap = import ./tap-support.nix;
+
+  results = builtins.concatLists (map (file: callPackage file testTools) testFiles);
+in
+  writeText "test-results.tap" (tap.output results)