WARNING: Spurious .git folder in library

[hryamzik]

Due to #3237 there shouldn't be such a warning but I do get in in Arduino IDE v1.6.6.

[ffissore]

This issue was moved to arduino/arduino-builder#70

[hryamzik]

@ffissore thanks!

[ffissore]

Fixed. Fix will be available in next hourly build http://www.arduino.cc/en/Main/Software#hourly