drat-trim: fix gcc-14 build

Without the change the build on `gcc-14` fails as:

    drat-trim.c: In function 'read_lit':
    drat-trim.c:989:10: error: implicit declaration of function 'getc_unlocked' [-Wimplicit-function-declaration]
      989 |     lc = getc_unlocked (S->proofFile);
          |          ^~~~~~~~~~~~

pkgs/by-name/dr/drat-trim/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
 }:
 
 stdenv.mkDerivation {
@@ -15,6 +16,15 @@ stdenv.mkDerivation {
     hash = "sha256-sV3A0f1TLSaTIdAtT6y8rU3ZS2UqEePJYSf3UySOlSA=";
   };
 
+  patches = [
+    # gcc-14 build fix: https://github.com/marijnheule/drat-trim/pull/40
+    (fetchpatch {
+      name = "gcc-14-fix.patch";
+      url = "https://github.com/marijnheule/drat-trim/commit/8186a7dc083a3951ba87e5ff35d36f1ea2c03f0d.patch";
+      hash = "sha256-jgsOYcRYD2VGdOrXW9D8Jh80Nqd+Kp3d2IU+bNK1yGg=";
+    })
+  ];
+
   postPatch = ''
     substituteInPlace Makefile --replace gcc cc
   '';