Optimize printing in footer update with use a StringIO buffer and it
prints content to terminal in a single call in every cycle.
(Bitbake rev: 32ba622d78f20b231f30f848379b4bbc3d7414da)
Signed-off-by: Benjamin Szőke <egyszeregy@freemail.hu>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>