Return the correct length of nmea sentence.

Return the correct length of nmea sentence in the
function loc_eng_nmea_put_checksum(). The correct
length is length of NMEA string including ‘$’
character alongwith length of checksum.

CRs-Fixed: 1020044
Change-Id: I45a086190008df79a93b9386bc69d9c50e47c93b
1 file changed