user/mesa: Enable the SVGA driver for VMware

This builds the Gallium3D driver for "SVGA", which is, for some reason,
what VMware calls their accelerator driver.

Needed to use Wayland on VMware virtual machines.

user/mesa/APKBUILD

@@ -23,7 +23,7 @@ subpackages="$pkgname-dev $pkgname-dri $pkgname-vulkan-overlay $pkgname-gbm
 source="https://mesa.freedesktop.org/archive/mesa-$pkgver.tar.xz"
 
 _dri_driverdir=/usr/lib/xorg/modules/dri
-_gallium_drivers="r300,r600,radeonsi,nouveau,softpipe,llvmpipe,virgl,zink"
+_gallium_drivers="r300,r600,radeonsi,nouveau,softpipe,llvmpipe,virgl,zink,svga"
 _vulkan_drivers="amd,nouveau,swrast,virtio"
 
 case "$CARCH" in