schifra: fix install examples

Fixes:

http://autobuild.buildroot.net/results/1ec/1ec3664f28492bf3da53dcbe8ceeb165bce8df6d/build-end.log



Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Acked-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>