bin: Fixed kernel version check
bin: Fixed kernel version check

This was failing for major=4, minor=2 (XUbuntu 14.04.4) due to the precedence
of || and &&.  The `&& [ "$minor" -gt "17" ]` condition was being evaluated
when it wasn't intended to.

This change ensures the conditions are grouped properly.

jynik/gnuradio-livesdr,jynik/gnuradio-livesdr