bug#9336: 24.0.50; No way to input character #xbb4 using ta-itrans

[Jambunathan K]

> Very rarely used 
> ================
>
> No input methods for these. In general do they have one?
>
> ஷ
> ஸ
> ஹ

I made a mistake here. Looks like I did C-u C-x = while the input method
was English and naturally the "to input" field was not displayed.

Here is the table for these characters.

Very rarely used 
================

Sh,shh  ஷ்
s       ஸ்
h       ஹ்