Update install-arduino.sh

Author: Jason2866

tools/install-arduino.sh

@@ -94,3 +94,4 @@ rm -rf "$AR_COMPS/arduino/libraries/ESP_SR"
 rm -rf "$AR_COMPS/arduino/libraries/ESP_NOW"
 rm -rf "$AR_COMPS/arduino/libraries/TFLiteMicro"
 rm -rf "$AR_COMPS/arduino/libraries/OpenThread"
+rm -rf "$AR_COMPS/arduino/libraries/PPP"