wic: do not remove build dir in source plugins
Interesting bug was found during implementation of 'include'
parser command.
Build directory was removed in do_configure_partition method of
bootimg- source plugins. This can cause removal of previously
prepared partition images if /boot partition is mentioned after
other partitions in .ks file.
Moved work directory removal to direct.py before processing
partitions.
(From OE-Core rev: ba98262573cf1600e0d477317f51d488b5f8c4bd)
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>