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/bootil/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, premake4
+}:
+
+stdenv.mkDerivation {
+  pname = "bootil";
+  version = "unstable-2019-11-18";
+
+  src = fetchFromGitHub {
+    owner = "garrynewman";
+    repo = "bootil";
+    rev = "beb4cec8ad29533965491b767b177dc549e62d23";
+    sha256 = "1njdj6nvmwf7j2fwqbyvd1cf5l52797vk2wnsliylqdzqcjmfpij";
+  };
+
+  # Avoid guessing where files end up. Just use current directory.
+  postPatch = ''
+    substituteInPlace projects/premake4.lua \
+      --replace 'location ( os.get() .. "/" .. _ACTION )' 'location ( ".." )'
+    substituteInPlace projects/bootil.lua \
+      --replace 'targetdir ( "../lib/" .. os.get() .. "/" .. _ACTION )' 'targetdir ( ".." )'
+  '';
+
+  nativeBuildInputs = [ premake4 ];
+
+  premakefile = "projects/premake4.lua";
+
+  installPhase = ''
+    install -D libbootil_static.a $out/lib/libbootil_static.a
+    cp -r include $out
+  '';
+
+  meta = with lib; {
+    description = "Garry Newman's personal utility library";
+    homepage = "https://github.com/garrynewman/bootil";
+    # License unsure - see https://github.com/garrynewman/bootil/issues/21
+    license = licenses.free;
+    maintainers = with maintainers; [ abigailbuccaneer ];
+    # Build uses `-msse` and `-mfpmath=sse`
+    badPlatforms = [ "aarch64-linux" ];
+  };
+}