libsndfile: fix build with gcc15

- add patch from merged upstream PR:
https://www.github.com/libsndfile/libsndfile/pull/1055

Fixes build failure with gcc15:
```
src/ALAC/alac_decoder.c:42:9: error: cannot use keyword 'false' as enumeration constant
   42 | {       false = 0,
      |         ^~~~~
src/ALAC/alac_decoder.c:42:9: note: 'false' is a keyword with '-std=c23' onwards
src/ALAC/alac_decoder.c:44:3: error: expected ';', identifier or '(' before 'bool'
   44 | } bool ;
      |   ^~~~
src/ALAC/alac_decoder.c:44:3: warning: useless type name in empty declaration
make[2]: *** [Makefile:2615: src/ALAC/alac_decoder.lo] Error 1
make[2]: *** Waiting for unfinished jobs....
src/ALAC/alac_encoder.c:49:9: error: cannot use keyword 'false' as enumeration constant
   49 |         false = 0,
      |         ^~~~~
src/ALAC/alac_encoder.c:49:9: note: 'false' is a keyword with '-std=c23' onwards
src/ALAC/alac_encoder.c:51:3: error: expected ';', identifier or '(' before 'bool'
   51 | } bool ;
      |   ^~~~
```

pkgs/by-name/li/libsndfile/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   autoreconfHook,
   autogen,
   pkg-config,
@@ -35,6 +36,15 @@ stdenv.mkDerivation rec {
     hash = "sha256-MOOX/O0UaoeMaQPW9PvvE0izVp+6IoE5VbtTx0RvMkI=";
   };
 
+  patches = [
+    # Fix build with gcc15
+    # https://github.com/libsndfile/libsndfile/pull/1055
+    (fetchpatch {
+      url = "https://github.com/libsndfile/libsndfile/commit/2251737b3b175925684ec0d37029ff4cb521d302.patch";
+      hash = "sha256-LaeptEicnjpVBExlK4dNMlN8+AAJhW8dIvemF6S4W2M=";
+    })
+  ];
+
   nativeBuildInputs = [
     autoreconfHook
     autogen