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/tools/rust/bindgen/default.nix

@@ -0,0 +1,47 @@
+{ rust-bindgen-unwrapped, zlib, bash, runCommand, runCommandCC }:
+let
+  clang = rust-bindgen-unwrapped.clang;
+  self = runCommand "rust-bindgen-${rust-bindgen-unwrapped.version}"
+    {
+      #for substituteAll
+      inherit bash;
+      unwrapped = rust-bindgen-unwrapped;
+      libclang = clang.cc.lib;
+      meta = rust-bindgen-unwrapped.meta // {
+        longDescription = rust-bindgen-unwrapped.meta.longDescription + ''
+          This version of bindgen is wrapped with the required compiler flags
+          required to find the c and c++ standard libary, as well as the libraries
+          specified in the buildInputs of your derivation.
+        '';
+      };
+      passthru.tests = {
+        simple-c = runCommandCC "simple-c-bindgen-tests" { } ''
+          echo '#include <stdlib.h>' > a.c
+          ${self}/bin/bindgen a.c --whitelist-function atoi | tee output
+          grep atoi output
+          touch $out
+        '';
+        simple-cpp = runCommandCC "simple-cpp-bindgen-tests" { } ''
+          echo '#include <cmath>' > a.cpp
+          ${self}/bin/bindgen a.cpp --whitelist-function erf -- -xc++ | tee output
+          grep erf output
+          touch $out
+        '';
+        with-lib = runCommandCC "zlib-bindgen-tests" { buildInputs = [ zlib ]; } ''
+          echo '#include <zlib.h>' > a.c
+          ${self}/bin/bindgen a.c --whitelist-function compress | tee output
+          grep compress output
+          touch $out
+        '';
+      };
+    }
+    # if you modify the logic to find the right clang flags, also modify rustPlatform.bindgenHook
+    ''
+    mkdir -p $out/bin
+    export cincludes="$(< ${clang}/nix-support/cc-cflags) $(< ${clang}/nix-support/libc-cflags)"
+    export cxxincludes="$(< ${clang}/nix-support/libcxx-cxxflags)"
+    substituteAll ${./wrapper.sh} $out/bin/bindgen
+    chmod +x $out/bin/bindgen
+  '';
+in
+self