Only write the UTF-8 BOM to the script itself, not all files.
Only write the UTF-8 BOM to the script itself, not all files.

Fixes #1990

Ventero/greasemonkey,Martii/greasemonkey,Ventero/greasemonkey,Martii/greasemonkey,the8472/greasemonkey,HasClass0/greasemonkey,HasClass0/greasemonkey,the8472/greasemonkey