community/libphonenumber: upgrade to 8.13.51
https://github.com/google/libphonenumber/blob/v8.13.51/release_notes.txt
(broke ABI without SONAME change: https://github.com/google/libphonenumber/commit/a8e4057fb5655b91ce08c28955b929bf956cfcbb)
Superseeds !75785