Add --fdpass flag to clamdscan command

[rsora]

Antivirus scan performed with clamav on downloaded repos was failing due to the following error:

2021/05/21 11:30:51 Error syncing library: exit status 2
2021/05/21 11:30:51 Checking out tag: 1.0.2
2021/05/21 11:30:51 clamav output:
/home/arduino/workspace/workspace/Librariesv2/gitclones/github.com/arduino-libraries/Servo: lstat() failed: Permission denied. ERROR

This permission issue was solved taking a look to the clamdscan man

--fdpass
Pass the file descriptor permissions to clamd. This is useful if clamd is running as a different user as it is faster than streaming the file to clamd. Only available if connected to clamd via local(unix) socket.

[CLAassistant]

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