OE wic plugins create temporary file with the index of the line
tmp file name. This causes race in case several builds run in time.
If source_params['file'] is an absolute path, the cr_workdir prefix
is not applied by os.path.join(). So instead it writes to a ".1"
file next to the original image - this is outside the WORKDIR
and at risk of collision.
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org> Suggested-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Suggested-by: Paul Barker <pbarker@konsulko.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>