Update .travis.yml

Author: thijse

.travis.yml

@@ -16,7 +16,9 @@
     "sudo ln -s /usr/local/share/arduino/arduino /usr/local/bin/arduino",
     "sudo ln -s $PWD /usr/local/share/arduino/libraries/ArduinoLog",
     "arduino --verify --board arduino:avr:uno $PWD/examples/Log/Log.ino",
+    "sudo rm -rf /usr/local/share/arduino",
     "sudo cp -r arduino-1.8.1 /usr/local/share/arduino",
+    "sudo rm /usr/local/bin/arduino",
     "sudo ln -s /usr/local/share/arduino/arduino /usr/local/bin/arduino",
     "sudo ln -s $PWD /usr/local/share/arduino/libraries/ArduinoLog",
     "arduino --verify --board arduino:avr:uno $PWD/examples/Log/Log.ino",