Use UTF-8 encoding for process output on Mono
Use UTF-8 encoding for process output on Mono

Fixes encoding issus on systems when encoding property is not set.

rflechner/FAKE,Kazark/FAKE,MiloszKrajewski/FAKE,beeker/FAKE,beeker/FAKE,MichalDepta/FAKE,rflechner/FAKE,mglodack/FAKE,MichalDepta/FAKE,rflechner/FAKE,rflechner/FAKE,mglodack/FAKE,beeker/FAKE,mglodack/FAKE,beeker/FAKE,Kazark/FAKE,MichalDepta/FAKE,mglodack/FAKE,MiloszKrajewski/FAKE,MiloszKrajewski/FAKE,MiloszKrajewski/FAKE,Kazark/FAKE,MichalDepta/FAKE,Kazark/FAKE