libphonenumber: patch code generation tool for build reproducibility

diff --git a/tools/cpp/src/cpp-build/generate_geocoding_data.cc b/tools/cpp/src/cpp-build/generate_geocoding_data.cc

index 205947e831..1e628e2cd2 100644

--- a/tools/cpp/src/cpp-build/generate_geocoding_data.cc

+++ b/tools/cpp/src/cpp-build/generate_geocoding_data.cc

@@ -97,7 +97,8 @@ class DirEntry {

   DirEntryKinds kind_;

 };

-// Lists directory entries in path. "." and ".." are excluded. Returns true on

+// Lists directory entries in path. "." and ".." are excluded. Entries are

+// returned in a consistent order to ensure reproducibility. Returns true on

 // success.

 bool ListDirectory(const string& path, vector<DirEntry>* entries) {

   entries->clear();

@@ -135,6 +136,9 @@ bool ListDirectory(const string& path, vector<DirEntry>* entries) {

     }

     entries->push_back(DirEntry(entry->d_name, kind));

   }

+  std::sort(

+      entries->begin(), entries->end(),

+      [](const DirEntry& a, const DirEntry& b) { return a.name() < b.name(); });

 }

 // Returns true if s ends with suffix.

    sha256 = "sha256-xLxadSxVY3DjFDQrqj3BuOvdMaKdFSLjocfzovJCBB0=";

  };

  patches = [

    # Submitted upstream: https://github.com/google/libphonenumber/pull/2921

    ./build-reproducibility.patch

  ];

  nativeBuildInputs = [

    cmake

    pkg-config