python311Packages.pytorch: mark some flags as gcc-only

pkgs/development/python-modules/torch/default.nix

···
     "-Wno-pass-failed"
   ] ++ [
     "-Wno-unused-command-line-argument"
-    "-Wno-maybe-uninitialized"
     "-Wno-uninitialized"
     "-Wno-array-bounds"
-    "-Wno-stringop-overflow"
     "-Wno-free-nonheap-object"
     "-Wno-unused-result"
+  ] ++ lib.optionals stdenv.cc.isGNU [
+    "-Wno-maybe-uninitialized"
+    "-Wno-stringop-overflow"
   ]));
 
   nativeBuildInputs = [