[HarfBuzz] fix to harfbuzz for assamese language using bengali script

[Lars Knoll]

Hi Pravin,

the patch should not be required anymore. I did submit a patch to fix the 
problem last november. See 
http://cgit.freedesktop.org/harfbuzz/commit/?id=e66916e33821e71ba19479c32108a2be8bb539b2

Cheers,
Lars

> Hi,
> 
>     Bengali script contains two 'Ra' characters one for Bengali language
> (u09B0) and other for Assamese language (u09F0), so reph gets formed in
> these language with respective Ra character.
> 
>    trick used to fix this problem is Assamese Ra will be used only in
> assamese language, so if user enters u09F0 it means that this is
> Assamese language and should change reph to u09F0
> 
>   see https://bugzilla.redhat.com/show_bug.cgi?id=437440 i fixed this
> problem long time back and presently using this in fedora, but still
> patch is not in upstream
> 
>   It will be very nice, if we can add this patch (see attachment) in
> upstream, let me know if anything required from me
> 
> Thanks,
> Pravin S