libaio has some architecture-specific code, and isn't available for all architectures that Buildroot support. Fixes http://autobuild.buildroot.org/results/b171a6d6243ea021dc52830bc4b9d36fc083a60d/build-end.log. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
'default n' is the default, so there's no need to say it explicitly.