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/libraries/khronos-ocl-icd-loader/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchFromGitHub, opencl-headers, cmake, withTracing ? false }:
+
+stdenv.mkDerivation rec {
+  pname = "khronos-ocl-icd-loader";
+  version = "2022.01.04";
+
+  src = fetchFromGitHub {
+    owner = "KhronosGroup";
+    repo = "OpenCL-ICD-Loader";
+    rev = "v${version}";
+    sha256 = "sha256-T2tBoN0yv41W+UksFABVjsetdkXlnEFUINfxumGgC04=";
+  };
+
+  patches = lib.optional withTracing ./tracing.patch;
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ opencl-headers ];
+
+  meta = with lib; {
+    description = "Offical Khronos OpenCL ICD Loader";
+    homepage = "https://github.com/KhronosGroup/OpenCL-ICD-Loader";
+    license = licenses.asl20;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ davidtwco ];
+  };
+}

pkgs/development/libraries/khronos-ocl-icd-loader/tracing.patch

@@ -0,0 +1,13 @@
+diff --git a/loader/icd.h b/loader/icd.h
+index 34751e9..01a33fd 100644
+--- a/loader/icd.h
++++ b/loader/icd.h
+@@ -123,7 +123,7 @@ void khrIcdContextPropertiesGetPlatform(
+     cl_platform_id *outPlatform);
+ 
+ // internal tracing macros
+-#if 0
++#if 1
+     #include <stdio.h>
+     #define KHR_ICD_TRACE(...) \
+     do \