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/libks/default.nix

@@ -0,0 +1,48 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, fetchpatch
+, cmake
+, pkg-config
+, libuuid
+, openssl
+}:
+
+stdenv.mkDerivation rec {
+  pname = "libks";
+  version = "1.7.0";
+
+  src = fetchFromGitHub {
+    owner = "signalwire";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "1wvl8kzi1fx7pg58r5x1lw4gwkvrkljqajsn72yq6sbsd3iqn8wr";
+  };
+
+  patches = [
+    (fetchpatch {
+      url = "https://raw.githubusercontent.com/openwrt/telephony/5ced7ea4fc9bd746273d564bf3c102f253d2182e/libs/libks/patches/01-find-libm.patch";
+      sha256 = "1hyrsdxg69d08qzvf3mbrx2363lw52jcybw8i3ynzqcl228gcg8a";
+    })
+  ];
+
+  dontUseCmakeBuildDir = true;
+
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
+
+  buildInputs = [
+    libuuid
+    openssl
+  ];
+
+  meta = with lib; {
+    description = "Foundational support for signalwire C products";
+    homepage = "https://github.com/signalwire/libks";
+    maintainers = with lib.maintainers; [ misuzu ];
+    platforms = platforms.linux;
+    license = licenses.mit;
+  };
+}