fix leaks in viterbi and modem tests

lib/src/phy/fec/test/viterbi_test.c

@@ -279,6 +279,7 @@ int main(int argc, char **argv) {
   free(llr);
   free(llr_c);
   free(data_rx);
+  free(data_rx2);
   
   if (snr_points == 1) {
     int expected_errors = get_expected_errors(nof_frames, seed, frame_length, tail_biting, ebno_db);

lib/src/phy/modem/test/modem_test.c

@@ -197,6 +197,7 @@ int main(int argc, char **argv) {
     }
   }
 
+  free(llr2);
   free(llr);
   free(symbols);
   free(symbols_bytes);