boa: add a hash file
It will clarify errors like this one:
http://autobuild.buildroot.net/results/b71/b71084d67d33e80cde9478dcf5a89511479cb95e/
Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>