Autostart: Do not abort boot if sensor driver fails to start

ROMFS/px4fmu_common/init.d/rcS

@@ -706,26 +706,34 @@ then
 	if param compare SENS_EN_SF0X 0
 	then
 	else
-		sf0x start
+		if sf0x start
+		then
+		fi
 	fi
 
 	# lightware i2c lidar sensor
 	if param compare SENS_EN_SF1XX 0
 	then
 	else
-		sf1xx start
+		if sf1xx start
+		then
+		fi
 	fi
 
 	# mb12xx sonar sensor
 	if param compare SENS_EN_MB12XX 1
 	then
-		mb12xx start
+		if mb12xx start
+		then
+		fi
 	fi
 
 	# teraranger one tof sensor
 	if param compare SENS_EN_TRONE 1
 	then
-		trone start
+		if trone start
+		then
+		fi
 	fi
 
 	if ver hwcmp PX4FMU_V4