virtualbox: 5.2.0 -> 5.2.2

Upstream changes without issue IDs:

 * User interface: various improvements for high resolution screens
 * User interface: added functionality to duplicate optical and floppy
                   images
 * User interface: various improvements for the virtual media manager
 * VMM: fixed emulation so that Plan 9 guests can start once more (5.1.0
        regression)
 * Storage: fixed regression breaking iSCSI
 * Audio: added HDA support for more exotic guests (e.g. Haiku)
 * Serial: fixed hanging I/O when using named pipes on Windows (5.2.0
           regression)
 * Serial: fixed broken communication with certain devices on Linux
           hosts
 * USB/OHCI: improved behavior so that the controller state after a VM
             reset is closer to the initial state after VM start
 * EFI: fixed HFS+ driver which in rare cases failed to access most
        files on a volume
 * Shared clipboard: fixed hang with OS X host and Linux guest
 * Linux hosts: fixed kernel module compilation and start failures with
                Linux kernel 4.14
 * X11 hosts: better handle WM_CLASS setting
 * Linux guests: fixed kernel module compilation and other problems with
                 Linux kernel 4.14
 * Linux guests: fixed various 5.2.0 regressions
 * Bridged networking: fixed duplicate EtherType in VLAN/priority tags
                       on Linux (5.2.0 regression)

The full changelog including issue IDs can be found at:

https://www.virtualbox.org/wiki/Changelog

Aside from just bumping the version number I also had to strip 3 levels
of the paths included in the guest-additions patches, because the
version was hardcoded in there and the patches still apply as-is.

I've re-added the stripped path using patchFlags and the -d option of
the patch utility.

Tested this by running all of the tests in the "virtualbox" NixOS VM
test module, here is the URL to the finished evaluation on my Hydra:

https://headcounter.org/hydra/eval/380191



Signed-off-by: aszlig <aszlig@nix.build>
Cc: @NeQuissimus, @orivej, @etu, @vcunat
Issue: https://github.com/NixOS/nixpkgs/issues/31640
Issue: https://github.com/NixOS/nixpkgs/pull/31037