Add Tajik spellcheck dictionary

Add Tajik spellcheck dictionary.

R=groby@chromium.org
TBR=brettw@chromium.org
BUG=330155
Committed: https://src.chromium.org/viewvc/chrome/trunk/deps/third_party/hunspell_dictionaries/255132

[please use gerrit instead, 2014-03-04 18:44:44]

Groby: PTAL. The patch does not show bdic file, because it's binary.

Odil: I had some free time and decided to help out your project.

[groby-ooo-7-16, 2014-03-04 19:03:27]

I assume this has been blessed by legal?

[please use gerrit instead, 2014-03-04 19:16:13]

On 2014/03/04 19:03:27, groby wrote:
> I assume this has been blessed by legal?

Good point. Let me talk to them briefly. I do not anticipate hurdles, since
Apache license is used in many other third party libraries in Chrome. brb.

[groby-ooo-7-16, 2014-03-04 19:44:29]

LGTM based on offline discussion

[please use gerrit instead, 2014-03-04 22:05:08]

Testing shows there seems to be a problem with character
http://www.fileformat.info/info/unicode/char/4b7/index.htm in the affix file. If
the character is in TRY, then hunspell ignores the TRY statement. If I remove
the character from TRY, then hunspell uses the TRY statement correctly. I will
investigate and fix this issue before committing.

[please use gerrit instead, 2014-03-04 22:41:16]

Here's the error from the ICU word iterator:

"Could not figure out the script code for language "tg". Using the default =
USCRIPT_LATIN."

Looks like I need to file a bug with ICU and add a workaround in the word
iterator to use USCRIPT_CYRILLIC.

[please use gerrit instead, 2014-03-04 23:29:12]

Filed https://code.google.com/p/chromium/issues/detail?id=349194 to fix the ICU
word iterator before this dictionary can be used.

[please use gerrit instead, 2014-03-05 19:42:26]

The CQ bit was checked by rouslan@chromium.org

[please use gerrit instead, 2014-03-05 20:08:55]

The CQ bit was unchecked by rouslan@chromium.org

[please use gerrit instead, 2014-03-05 20:15:49]

Committed patchset #1 manually as r255132 (presubmit successful).