Since commit [1], the testsuite build is unconditionally disabled
although we have the option BR2_PACKAGE_XENOMAI_TESTSUITE to
install Xenomai testsuite on the target.
Handle --disable-testsuite option with BR2_PACKAGE_XENOMAI_TESTSUITE.
[1] 74196b7d05
Signed-off-by: Pierre Ficheux <pierre.ficheux@smile.fr>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Cc: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>