package/mtdev2tuio: fix musl build
Fixes
http://autobuild.buildroot.net/results/aee/
aee411047265bf205f8990a3d0d2310decb5fd19/
http://autobuild.buildroot.net/results/9a9/
9a96fdd2b52a75b348b46696c7f8b427f2d987c2/
http://autobuild.buildroot.net/results/2e1/
2e155f2f57fd035362ad1b414f42e1c2b5de844b/
http://autobuild.buildroot.net/results/f62/
f62d3830c594d9169fa9b9df5212f190d676fab9/
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>