Update XZ Utils to 5.0.4 (third_party)

Update XZ Utils to 5.0.3.

Information about this release from README.chromium:

--
Name: XZ Utils
URL: http://tukaani.org/xz/
Source URL: http://git.tukaani.org/xz.git
Version: 5.0.4 (git tag v5.0.4, f6999fefe47884922f3f62186ddcf849d54b1092,
         2012-06-22 07:54:56 +0300)
License: Public domain/license grant, LGPL 2.1, GPL 2, GPL 3

Description:
XZ Utils is general-purpose data compression software implementing the
modified Lempel-Ziv-Markov chain algorithm (LZMA2).

Local Modifications:
 - None.
--

From NEWS:

--
5.0.4 (2012-06-22)

    * liblzma:

        - Fix lzma_index_init(). It could crash if memory allocation
          failed.

        - Fix the possibility of an incorrect LZMA_BUF_ERROR when a BCJ
          filter is used and the application only provides exactly as
          much output space as is the uncompressed size of the file.

        - Fix a bug in doc/examples_old/xz_pipe_decompress.c. It didn't
          check if the last call to lzma_code() really returned
          LZMA_STREAM_END, which made the program think that truncated
          files are valid.

        - New example programs in doc/examples (old programs are now in
          doc/examples_old). These have more comments and more detailed
          error handling.

    * Fix "xz -lvv foo.xz". It could crash on some corrupted files.

    * Fix output of "xz --robot -lv" and "xz --robot -lvv" which
      incorrectly printed the filename also in the "foo (x/x)" format.

    * Fix exit status of "xzdiff foo.xz bar.xz".

    * Fix exit status of "xzgrep foo binary_file".

    * Fix portability to EBCDIC systems.

    * Fix a configure issue on AIX with the XL C compiler. See INSTALL
      for details.

    * Update French, German, Italian, and Polish translations.
--

BUG=222086
Committed r189101

[Mark Mentovai, 2013-03-19 18:44:56]

https://codereview.chromium.org/12568011/diff/1/README.chromium
File README.chromium (left):

https://codereview.chromium.org/12568011/diff/1/README.chromium#oldcode1
README.chromium:1: Name: XZ Utils
I don’t know why this file was here. It was incomplete and badly out of date.
The real README.chromium is in the parent directory,
https://codereview.chromium.org/12938007/ .

[Avi (use Gerrit), 2013-03-19 19:46:27]

lgtm

stampity stamp