Add Fedora 9 & CentOS 5.2 instructions to OpenJDK Build README

Add information to README-builds.html on building on Fedora 9 and CentOS 5.2:

General vmware instructions:
  20Gb disk image
  1024Mb RAM setting
  Install vmware tools (used tar.gz installer, rpm didn't seem to work)
  Turn off screensaver

Latest Fedora 9
  Do complete Software Update
  Install Software development bundle
  Install packages:
    hg (at least 0.9.5) - Only if you plan on using Mercurial
    cups devel package
    ksh (if you plan on using webrev)
    freetype 2.3+ devel packages
  Do complete Software Update

And CentOS 5.2 (Same procedures for RedHat Enterprise 5.2)
  Do complete Software Update
  Install bundles:
    Development Libraries
    Development Applications
    Java Development
    X11 Development
  Install packages:
    cups
    ant
    alsa devel
    Xi devel
  No mercurial packages available, search web for RedHat Enterprise 5 Mercurial packages and install them
  No freetype 2.3 packages available, so download freetype 2.3 sources, build and install
    http://downloads.sourceforge.net/freetype/freetype-2.3.7.tar.gz?modtime=1214734497&big_mirror=0
    ./configure && make && sudo -u root make install
  Do complete Software Update