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/librem/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchFromGitHub, zlib, openssl, libre }:
+stdenv.mkDerivation rec {
+  version = "1.0.0";
+  pname = "librem";
+  src = fetchFromGitHub {
+    owner = "baresip";
+    repo = "rem";
+    rev = "v${version}";
+    sha256 = "sha256-6Xe9zT0qLLGe1+QCQ9NALoDTaRhHpaTLbCbA+kV7hOA=";
+  };
+  buildInputs = [ zlib openssl libre ];
+  makeFlags = [
+    "LIBRE_MK=${libre}/share/re/re.mk"
+    "LIBRE_INC=${libre}/include/re"
+    "PREFIX=$(out)"
+  ]
+  ++ lib.optional (stdenv.cc.cc != null) "SYSROOT_ALT=${lib.getDev stdenv.cc.cc}"
+  ++ lib.optional (stdenv.cc.libc != null) "SYSROOT=${lib.getDev stdenv.cc.libc}"
+  ;
+  meta = {
+    description = "A library for real-time audio and video processing";
+    homepage = "https://github.com/baresip/rem";
+    maintainers = with lib.maintainers; [ elohmeier raskin ];
+    license = lib.licenses.bsd3;
+  };
+}