fixed gtk+ Tamil translation

[Noah Levitt <nlevitt columbia edu>]

ta.po for gtk+ was broken in a way that's easiest to
describe by explaining how I fixed it:

 $ iconv -f UTF-8 -t latin1 ta.po > ta.po.latin1
 $ iconv -f TSCII -t UTF-8 ta.po.latin1 > ta.po

(In words-- it looks like it was originally in TSCII;
someone took the TSCII and thought it was latin1, and
converted it to UTF-8.)

I did that on the ta.po in HEAD and gtk-2-2. I'm 99% it was
the right thing, but I'd appreciate if someone could check.
:)

Noah