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/applications/virtualization/qemu/binfmt-p-wrapper.nix

@@ -0,0 +1,31 @@
+# binfmt preserve-argv[0] wrapper
+#
+# More details in binfmt-p-wrapper.c
+#
+# The wrapper has to be static so LD_* environment variables
+# cannot affect the execution of the wrapper itself.
+
+{ lib, stdenv, pkgsStatic, enableDebug ? false }:
+
+name: emulator:
+
+pkgsStatic.stdenv.mkDerivation {
+  inherit name;
+
+  src = ./binfmt-p-wrapper.c;
+
+  dontUnpack = true;
+  dontInstall = true;
+
+  buildPhase = ''
+    runHook preBuild
+
+    mkdir -p $out/bin
+    $CC -o $out/bin/${name} -static -std=c99 -O2 \
+        -DTARGET_QEMU=\"${emulator}\" \
+        ${lib.optionalString enableDebug "-DDEBUG"} \
+        $src
+
+    runHook postBuild
+  '';
+}