mesa: enable a rich set of drivers for native builds

mesa: enable a rich set of drivers for native builds

Without this, the only available driver would be swrast
(without llvmpipe) which is far too slow to be practical,
and so qemu wouldn't be able to perform accelerated graphics.

The one major dependency pulled in by this change is llvm-native
which takes just under three minutes on my machine. If this is
undesitable, opengl can be removed from DISTRO_FEATURES_NATIVE.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>