update qemu to 2.1.0

Closes #31376.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
qemu: add 2.1.0 bottle.

Closes #31383.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libslax 0.18.1
libslax: add 0.18.1 bottle.