Add the mkisofs package to the Windows mkbuildmachine scripts.

This adds the genisoimage command. Also update the cygwin installer
checksum as there is a new one.

OXT-65

Signed-off-by: Ross Philipson <ross.philipson@gmail.com>
Add support for generating a Windows only tools ISO

This will not break existing build machines that do not have
the genisoimage for cygwing. Once aded the stage step will start
creating the ISO.

OXT-65

Singed-off-by: Ross Philipson <ross.philipson@gmail.com>
Merge pull request #43 from rossphilipson/mkisofs

Add support for generating a Windows only tools ISO
OE: Move local build config to openxt.git and use build/ as TOPDIR.

This commit moves the local build metadata out of the xenclient-oe.git
repo and into openxxt.git. These things aren't typically part of a meta
layer. Turning xenclient-oe.git into a meta layer means moving these
to a new home in openxt.git. Minor edits to these files have been made
so that the build TOPDIR is build/ instead of build/oe/.

bb: Move the helper script 'bb' from xenclient-oe.git to the the openxt.git
    build directory.
bblayers.conf: Move the main 'conf' directory and the bblayers.conf file from
    xenclient-oe.git to openxt.git.
do_build.sh: Fixup paths to find the new location of the build output and
    configuration.
.gitignore: Be a bit more specific about ignored build
    files.

0XT-23

Signed-off-by: Philip Tricca <flihp@twobit.us>