ibus-engines.mozc: fix build by pinning protobuf

The overidden protobuf would no longer build after update
https://hydra.nixos.org/build/231653253/nixlog/2/tail

Changed files
+1 -1
pkgs
top-level
+1 -1
pkgs/top-level/all-packages.nix
···
mozc = callPackage ../tools/inputmethods/ibus-engines/ibus-mozc {
stdenv = clangStdenv;
-
protobuf = pkgs.protobuf.overrideDerivation (_: { stdenv = clangStdenv; });
};
rime = callPackage ../tools/inputmethods/ibus-engines/ibus-rime { };
···
mozc = callPackage ../tools/inputmethods/ibus-engines/ibus-mozc {
stdenv = clangStdenv;
+
protobuf = pkgs.protobuf3_21.overrideDerivation (_: { stdenv = clangStdenv; });
};
rime = callPackage ../tools/inputmethods/ibus-engines/ibus-rime { };