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/vc/0.7.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "Vc";
+  version = "0.7.5";
+
+  src = fetchFromGitHub {
+    owner = "VcDevel";
+    repo = "Vc";
+    rev = version;
+    sha256 = "190s4r2n3jsivl4j2m288j3rqmgjj6gl308hi9mzwyhcfn17q8br";
+  };
+
+  # Avoid requesting an unreasonable intrinsic
+  patches = lib.optional stdenv.cc.isClang ./vc_0_7_clang_fix.patch;
+
+  nativeBuildInputs = [ cmake ];
+
+  postPatch = ''
+    sed -i '/OptimizeForArchitecture()/d' cmake/VcMacros.cmake
+    sed -i '/AutodetectHostArchitecture()/d' print_target_architecture.cmake
+  '';
+
+  meta = with lib; {
+    broken = (stdenv.isLinux && stdenv.isAarch64);
+    description = "Library for multiprecision complex arithmetic with exact rounding";
+    homepage = "https://github.com/VcDevel/Vc";
+    license = licenses.bsd3;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}