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/tools/text/agrep/default.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation {
+  pname = "agrep";
+  version = "3.41.5";
+
+  src = fetchFromGitHub {
+    owner = "Wikinaut";
+    repo = "agrep";
+    # This repository has numbered versions, but not Git tags.
+    rev = "eef20411d605d9d17ead07a0ade75046f2728e21";
+    sha256 = "14addnwspdf2mxpqyrw8b84bb2257y43g5ccy4ipgrr91fmxq2sk";
+  };
+
+  # Related: https://github.com/Wikinaut/agrep/pull/11
+  prePatch = lib.optionalString (stdenv.hostPlatform.isMusl || stdenv.isDarwin) ''
+    sed -i '1i#include <sys/stat.h>' checkfil.c newmgrep.c recursiv.c
+  '';
+  installPhase = ''
+    install -Dm 555 agrep -t "$out/bin"
+    install -Dm 444 docs/* -t "$out/doc"
+  '';
+
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
+
+  meta = with lib; {
+    description = "Approximate grep for fast fuzzy string searching";
+    homepage = "https://www.tgries.de/agrep/";
+    license = licenses.isc;
+    platforms = with platforms; linux ++ darwin;
+  };
+}