do_build.sh : Move the contents of 'misc' into 'build'

This mirrors the "standard" OE build layout including the Angstrom
setup-scripts. I'm not sure what the 'home' directory is for so I
left it in place for now.

OXT-94

Signed-off-by: Philip Tricca <flihp@twobit.us>
xenclient-oe : Clone openxt build metadata with all the other meta-layers.

bblayers.conf : Change path to xenclient-oe build metadata.
local.conf-dist : Add local.conf template from xenclient-oe.git.
do_build.sh : Remove git clone of xenclient-oe.git and use variables
  in local.settings file instead.
setup_build : Clone xenclient-oe.git and fixup pathto bitbake patches.

OXT-24

Signed-off-by: Philip Tricca <flihp@twobit.us>
do_build.sh : Get rid of of HOME.

This was to keep git happy for builds where the user doing the build
had no homedir or git config. This was required in two scenarios:
our use of guilt that is no longer the case due to the pq class going
away, and builds run by users without git configured. The prior isn't
an issue any longer and the later is a deficiency of the builder. No
need to complicate our build scripts on account of misconfigured
builders.

OXT-94

Signed-off-by: Philip Tricca <flihp@twobit.us>
Merge pull request #44 from flihp/OXT-94and24

OXT-24 & OXT-94