Merge pull request #197320 from figsoda/starfetch

starfetch: fix build on darwin

pkgs/tools/misc/starfetch/default.nix

···
 
   postPatch = ''
     substituteInPlace src/starfetch.cpp --replace /usr/local/ $out/
+  '' + lib.optionalString stdenv.cc.isClang ''
+    substituteInPlace makefile --replace g++ clang++
   '';
 
   installPhase = ''