Wine Mono / Gecko packages are already cached in a contrib folder,
and downloading them outside of proton source directory is brittle.
This also makes the source sync run twice when using the toplevel
Makefile.
This breaks MinGW autoimport mechanism but nothing in Proton should be
using it. Instead, any PE module should be using standard dllimport and
ntdll will do the relocations as expected. We also don't and hopefully
never have modules larger than 2GB, so 32-bit %rip relative offsets
should be enough for everything.
This will OTOH save a lot of .refptr indirections, that are otherwise
generated for any extern symbols, even though they are later linked in
the same module, making all code smaller and maybe a little faster.
We can move everything but Liberation fonts build to the container.
Sadly those require newer version of fontforge than the one available in
the Steam RT.
There's some extra logic necessary to assure that font build triggers in
the container with the default/all targets.
This removes the requirement to have afdko and fonttools installed on
the host.
They are metrically compatible with MS Gothic fonts. Attack on Titan 2
- A.O.T.2 - 進撃の巨人２ and Touhou Fuujinroku ~ Mountain of Faith are
known to render better with Ume fonts.
CW-Bug-Id: #19849
CW-Bug-Id: #19971
