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/applications/science/logic/drat-trim/default.nix

@@ -0,0 +1,45 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation {
+  pname = "drat-trim-unstable";
+  version = "2020-06-05";
+
+  src = fetchFromGitHub {
+    owner = "marijnheule";
+    repo = "drat-trim";
+    rev = "9afad0f7156a1e9c6ce19dce5d72cf1cb9a3ef27";
+    sha256 = "1zq585igfaknwqbvv2cji744016zxadbvr0ifr5l6yq13m0vvn3b";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile --replace gcc cc
+  '';
+
+  installPhase = ''
+    install -Dt $out/bin drat-trim lrat-check
+  '';
+
+  meta = with lib; {
+    description = "A proof checker for unSAT proofs";
+    longDescription = ''
+      DRAT-trim is a satisfiability proof checking and trimming
+      utility designed to validate proofs for all known satisfiability
+      solving and preprocessing techniques.  DRAT-trim can also emit
+      trimmed formulas, optimized proofs, and TraceCheck+ dependency
+      graphs.
+
+      DRAT-trim has been used as part of the judging process in the
+      annual SAT Competition in recent years, in order to check
+      competing SAT solvers' work when they claim that a SAT instance
+      is unsatisfiable.
+
+      This package also contains the related tool LRAT-check, which checks a
+      proof format called LRAT which extends DRAT with hint statements to speed
+      up the checking process.
+    '';
+    homepage = "https://www.cs.utexas.edu/~marijn/drat-trim/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kini ];
+    platforms = platforms.all;
+  };
+}