Test Rababa on GNDB Arabic data

[ronaldtse]

This is easier than #4 :

1. Fetch ara_Arab2Latn_BGN_1956.csv (27.9MB) from https://github.com/interscript/geonames-transliteration-data/releases/download/v20210705/pairs.zip

2. Run the NNets on Arabic (SRC_FULL_NAME_RO column)

3. Run the output of step 2 using Interscript system (ara_Arab2Latn_BGN_1956 is this one: https://www.interscript.org/systems/bgnpcgn-ara-Arab-Latn-1956)

4. Compare the output of ara_Arab2Latn_BGN_1956.csv column DEST_FULL_NAME_RO and output of step 2.

[ronaldtse]

@gilgameshjw is doing this.