Fix missing Telugu letters

This CL adds missing the following Telugu letters
- U+0C4A: TELUGU VOWEL SIGN O
- U+0C1E: TELUGU LETTER NYA
And also reorganizes some letter reasonably.

Bug: 10028759
Change-Id: If7fd3854ffab8484dbe6ced0ff2ed52be838e44d
3 files changed