pbulk: support chroots when running on a single host.
Set LOCAL_INCLUDE_DIR to LOCALBASE.
For non-multiarch don't append ARCH64_SUBDIR.
Merge branch 'joyent/feature/miscfix/2013Q2' into joyent/release/2013Q2
pbulk: add support for local_bulklog

This cleans up a previous patch which worked around issues writing
directly to bulklog over NFS.  By setting this variable we can write to
a local file system before moving to NFS at the end if necessary.
Merge branch 'joyent/feature/miscfix/2013Q2' into joyent/release/2013Q2
Update 'joyent' and 'wip' submodules.