buildroot

configs/olimex_a20_olinuxino_lime: Bump to U-Boot 2016.09.01

U-Boot 2016.09.01 is a bugfix release, so bump to this version.

Cc: Francois Perrad <fperrad@gmail.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>