The source project of this merge request has been removed.
build: restore support for modem gps locations that was lost during the move to meson
Macros GCLUE_USE_3G_SOURCE, GCLUE_USE_CDMA_SOURCE, GCLUE_USE_MODEM_GPS_SOURCE and GCLUE_USE_NMEA_SOURCE are not defined anymore, therefore location through modem gps is unavailable. This commit adds the macro definitions when the corresponding options are enabled.