ecopcr: fix build

Apply patch to make compilation work on GCC 14

pkgs/by-name/ec/ecopcr/gcc14.patch

@@ -0,0 +1,12 @@
+diff --git a/src/ecogrep.c b/src/ecogrep.c
+index 8d45312..d9fe676 100644
+--- a/src/ecogrep.c
++++ b/src/ecogrep.c
+@@ -5,6 +5,7 @@
+ #include <getopt.h>
+ #include <stdlib.h>
+ #include <sys/stat.h>
++#include <unistd.h>
+ 
+ 
+ #define VERSION "0.1"

pkgs/by-name/ec/ecopcr/package.nix

@@ -16,6 +16,10 @@ stdenv.mkDerivation rec {
     hash = "sha256-ssvWpi7HuuRRAkpqqrX3ijLuBqM3QsrmrG+t7/m6fZA=";
   };
 
+  patches = [
+    ./gcc14.patch
+  ];
+
   buildInputs = [
     gcc
     python3