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/misc/gti/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "gti";
+  version = "1.8.0";
+
+  src = fetchFromGitHub {
+    owner = "rwos";
+    repo = "gti";
+    rev = "v${version}";
+    sha256 = "sha256-x6ncvnZPPrVcQYwtwkSenW+ri0L6FpuDa7U7uYUqiyk=";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile --replace 'CC=cc' 'CC=${stdenv.cc.targetPrefix}cc'
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin $out/share/man/man6
+    cp gti $out/bin
+    cp gti.6 $out/share/man/man6
+  '';
+
+  meta = with lib; {
+    homepage = "https://r-wos.org/hacks/gti";
+    license = licenses.mit;
+    description = "Humorous typo-based git runner; drives a car over the terminal";
+    maintainers = with maintainers; [ fadenb ];
+    platforms = platforms.unix;
+  };
+}