Adding global configuration option to specify a custom year in order to postprocess old GNSS captures and avoid wrong week rollover

src/algorithms/PVT/libs/pvt_conf.h

@@ -91,6 +91,7 @@ public:
 
     bool enable_rx_clock_correction;
     bool show_local_time_zone;
+    int custom_year;
 
     Pvt_Conf();
 };