gpsd: add upstream patch to address bug #8401

This commit backports upstream gpsd commit
3e25e2167beb3936de3986fad9b6c9bdec82b81f, which fixes the build of the
NMEA driver.

Fixes Buildroot bug #8401, reported by kevin.alden2@gmail.com.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>