app-emulation/virtualbox-modules: change module load order

app-emulation/virtualbox-modules: change module load order

vboxnetadp, vboxnetflt and vboxpci depend on vboxdrv
Module                  Size  Used by
vboxdrv               425984  3 vboxpci,vboxnetadp,vboxnetflt

But since OpenRC commit d70b1c55b67b44b98c23ceed25bc428481f7e00a
modprobe is run with '--first-time' option, thus produsing harmless,
but stil nasty looking error: '* Failed to load vboxdrv' on boot

This commit changes module load order to prevent seeing the error.
This does not change behavior on older openrc systems.

Package-Manager: Portage-2.3.51, Repoman-2.3.12
Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org>
Signed-off-by: Lars Wendler <polynomial-c@gentoo.org>