Allow all sites to download webfonts

Summary:
Foundries license fonts for a specific domain. To help sites to respect
those licenses, browsers repurposed CORS from a security tool to a "let's
help sites to compliy with font vendors licenses" tool.

Nasqueron assets host only open source material, and as such,
there is no need for such restriction.

References:

• https://bugs.webkit.org/show_bug.cgi?id=86817
• https://drafts.csswg.org/css-fonts-3/#same-origin-restriction

Ref T1881.

Test Plan: Download from assets.nasqueron.org Font Awesome

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T1881

Differential Revision: https://devcentral.nasqueron.org/D3118