Add Sinhala transcription guide.
Add Sinhala transcription guide.

googlei18n/language-resources,google/language-resources,googlei18n/language-resources,google/language-resources,google/language-resources,googlei18n/language-resources,google/language-resources,google/language-resources,googlei18n/language-resources,googlei18n/language-resources,googlei18n/language-resources,google/language-resources