If we just use print, the bitbake logging functions don't see the message
and it can get lost if bitbake is for example logging messages to disk.
(From OE-Core rev: 73a3d0d337e26c2be89c215efb8a2c3dd5d5994d)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>