Add Arial fonts. CORE-16272
- Add "Arial", "Arial Bold", "Arial Bold Italic" and "Arial Italic" fonts by duplicating Liberation Sans fonts and renaming them.
- Disable some Arial font substitutes.
- Add LICENSE file.
I made these font files by using FontForge. Their family name is "Arial". Their display names are "Arial", "Arial Bold", "Arial Bold Italic" and "Arial Italic". Their font filenames are arial.ttf, arialbd.ttf, arialbi.ttf and ariali.ttf. The Underline Positions are hacked by adding an integer value for workaround of FontForge's bug.
