wireshark: fix on darwin

Need CMP0025 to be set. No way to do it from the command
line (overrode by the cmake_minimimum_version policy).

Fixes #44878

pkgs/applications/networking/sniffers/wireshark/cmake.patch

@@ -1,19 +0,0 @@
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -19,6 +19,7 @@
- # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- #
- 
-+cmake_minimum_required(VERSION 3.7)
- project(Wireshark C CXX)
- 
- # Updated by make-version.pl
-@@ -40,7 +41,7 @@
- 	# Needed for GREATER_EQUAL operator
- 	cmake_minimum_required(VERSION 3.7)
- else()
--	cmake_minimum_required(VERSION 2.8.8)
-+	cmake_minimum_required(VERSION 3.7)
- endif()
- 
- # Needs to be set after cmake_minimum_required or cmake_policy(VERSION)

pkgs/applications/networking/sniffers/wireshark/default.nix

@@ -49,8 +49,11 @@ in stdenv.mkDerivation {
       name = "fix-timeout.patch";
       url = "https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commitdiff_plain;h=8b5b843fcbc3e03e0fc45f3caf8cf5fc477e8613;hp=94af9724d140fd132896b650d10c4d060788e4f0";
       sha256 = "1g2dm7lwsnanwp68b9xr9swspx7hfj4v3z44sz3yrfmynygk8zlv";
-    })
-    ++ stdenv.lib.optional stdenv.isDarwin ./cmake.patch;
+    });
+
+  postPatch = ''
+    sed -i -e '1i cmake_policy(SET CMP0025 NEW)' CMakeLists.txt
+  '';
 
   preBuild = ''
     export LD_LIBRARY_PATH="$PWD/run"