support/check-bin-arch: exclude kernel modules for merged /usr

support/check-bin-arch: exclude kernel modules for merged /usr

When using a merged /usr, the kernel module path is really
/usr/lib/modules, as /lib is a symlink to usr/lib .

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 1b9a57442d0a234b03585235f516d755372f29b3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>