buildroot

package/aubio: disable unit tests with --notests

For each build step, --notests needs to be passed to waf script
to avoid runing the unit tests.
This allow to remove the patch removing the unit tests from wscript.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>