Makefile: Add -Wall to generate more compiler warnings
Makefile: Add -Wall to generate more compiler warnings

andrmarkv/gps-sdr-sim,andrmarkv/gps-sdr-sim,MohammadSecure/GPS-SDR-SIM,thx0701/gps-sdr-sim,sgk/gps-sdr-sim,andrmarkv/gps-sdr-sim,sgk/gps-sdr-sim,osqzss/gps-sdr-sim,thx0701/gps-sdr-sim,MohammadSecure/GPS-SDR-SIM,osqzss/gps-sdr-sim