docs/news.html: announce -rc4

<ul>

  <li><b>9 February 2009 -- 2009.02-rc4 released</b>

    <p>We had more than 50 changes since RC3, several of them

    toolchain related, so decided to make a RC4 as well. This is

    very much expected to be the final release candidate, so give it

    a good test and expect a final 2009.02 release this week unless

    critical issues are found.</p>

    <p>Head to the <a href="/downloads/">downloads page</a> to pick up the

    <a href="/downloads/buildroot-2009.02-rc4.tar.bz2">2009.02-rc4

    release candidate</a>, and report any problems found to the <a

    href="lists.html">mailing list</a> or <a

    href="http://bugs.uclibc.org">bug tracker</a>.</p>

  <li><b>31 January 2009 -- 2009.02-rc3 released</b>

      <p>RC3 is out with more cleanups and bug fixes. Unless big issues

    are found, expect this to be the last release candidate before the