Hard links can still fail even if st_dev is the same for source
and destination. In case of EXDEV error, fall back to copying.
(From OE-Core rev: c00423d6bab9849e331beadf4d3cee90e04fe295)
Signed-off-by: Manuel Huber <manuel.h87@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>