[LINUX] Path for sketch on Samba share is truncated

[facchinm]

Moved from arduino/Arduino#6276 by @my1fail

Arduino: 1.8.2 (Linux), Board: "Digispark (Default - 16.5mhz)"

/home/a1/Progs/arduino-1.8.2/arduino-builder -dump-prefs
...
 -verbose /run/user/1000/gvfs/smb-share:server=europa,share=tausch/Arduino/Sketches/Blink_test/Blink_test.ino/Blink_test.ino.ino

open /run/user/1000/gvfs/smb-share: no such file or directory