In [1], `-g` is accidentally dropped from CROSSCFLAGS and CROSSCXXFLAGS

[1] 7db02f48

From https://gitlab.winehq.org/wine/wine/-/blob/master/LICENSE

As indicated in the original bug report [1] the issue is specific to the
Nvidia drivers, which have been fixed back in 2019.

[1] https://bugs.winehq.org/show_bug.cgi?id=43530


Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

Omit the `rm -rf` - packages are build with `--clean` and/or
`--cleanbuild`.

Move the builddir creation where applicable, consistently quote both cd
and mkdir commands.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

We've been building with gst for a while now. Drop the misleading
comment.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

The CFLAGS should be set in the place they're used. Otherwise the
following fails:

makepkg --nobuild
makepkg --noexract

Note: I've moved everything, since a few related fixed are incoming.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>