astc-encoder: patch files to use a fixed build year

The build year is included in the help output.
See the discussion in #162133.

pkgs/tools/graphics/astc-encoder/default.nix

@@ -46,6 +46,12 @@ gccStdenv.mkDerivation rec {
     "-DCMAKE_BUILD_TYPE=Release"
   ];
 
+  # Set a fixed build year to display within help output (otherwise, it would be 1980)
+  postPatch = ''
+    substituteInPlace Source/cmake_core.cmake \
+      --replace 'string(TIMESTAMP astcencoder_YEAR "%Y")' 'set(astcencoder_YEAR "2022")'
+  '';
+
   # Link binaries into environment and provide 'astcenc' link
   postInstall = ''
     mv $out/astcenc $out/bin