Fix for Issue #640 - config.xml misformatted

[thomasklemenc]

• Move the license after the opening XML tag. Per spec, first characters of an XML file must be <?xml

... encoding must begin with an XML encoding declaration, in which the first characters must be '<?xml' ...

• Remove the BOM as it is not needed for UTF-8 encoded XML files

Fixes #640

CLA has been signed.

[Saad-Alaref]

I have done the same thing before reading this pull request, and it does indeed work.
This also fixes #642 and #643 since they are duplicates of #640.

[Ana06]

It seems I broke this file in #638, breaking FLARE-VM 🙈 I used addlicense to add the headers and it seems a <feff> (Byte Order Mark (BOM)) in this file caused that it added the header in the wrong way, breaking the file. I am not sure if this a bug in addlicense as the BOM likely shouldn't be there, as I also think it is not needed. In any case, @tgecko thanks for reporting and fixing the bug! 💐 @Saad-Alaref thank for confirming the fix work and the additional details 💐

[JackStuart]

Hi @Ana06, It was a bug in Addlicence - I have created a PR to fix it. Maybe you might have more traction getting someone in Google to take a look at it because it hasn't been updated in 2.5 years

google/addlicense#166