host tests: Fix missing newlines

Tools/tests-host/autodeclination_test.cpp

@@ -25,4 +25,4 @@ int main(int argc, char *argv[]) {
 
 	printf("lat: %f lon: %f, dec: %f\n", lat, lon, declination);
 
-}
+}

Tools/tests-host/mixer_test.cpp

@@ -11,4 +11,4 @@ int main(int argc, char *argv[]) {
 	test_mixer(3, args);
 
 	test_conv(1, args);
-}
+}

Tools/tests-host/sbus2_test.cpp

@@ -72,4 +72,4 @@ int main(int argc, char *argv[]) {
 		warnx("Test aborted, errno: %d", ret);
 	}
 
-}
+}