fix(MSI): add guide mapping for F15

[LukeShortCloud]

No description provided.

[LukeShortCloud]

For some reason, my MSI Claw 8 A2VM had a non-working guide button. I used evtest to check and found that it emits F15 (not F16). Since the other MSI configurations seems to have the same keys, I added F15 to all of those devices in case it helps.

For reference, this is my BIOS version (likely newer than what most people have on this device):

$ cat /sys/devices/virtual/dmi/id/bios_version
E1T52IMS.112

Tested and working with InputPlumber 0.81.0

[LukeShortCloud]

The more I look at this, the more it seems like I'm just dumb and it's a GameOS issue. I need to double-check some things.

[pastaq]

update systemd and make sure you have my kernel patch for wmi-msi.c