package/bluez_utils: add missing check dependency for test program

Tests are enabled since this has been introduced [1], so keep
them for now.

bluez_utils needs check tool and check if it's available [2].

[1] 06c3e215
[2] https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/configure.ac?h=4.101#n51



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