bug#56801: libinput won't recognize /etc/libinput/local-overrides.quirks

[Cairn]

The libinput package doesn't seem to contain its own version of 
local-overrides.quirks, although it does contain an empty `/etc/libinput/`. 
Regardless, `quirks debug: 
/gnu/store/*-libinput-1.19.2/etc/libinput/local-overrides.quirks` is listed 
when running the following:

    libinput quirks list --verbose /dev/input/event0

Since it's returned, it seems to selecting this non-existent file as its local 
quirks list. This prevents libinput from recognizing a custom 
`local-overrides.quirks`. For example, I'm attempting to speed up my trackpoint 
(/dev/input/event17). If I add a working modification method[1] to 
`/etc/libinput/local-overrides.quirks`, I can see my value modified with the 
following:

    libinput quirks list --data-dir /etc/libinput /dev/input/event17

But when I remove the `--data-dir` flag, I'm returned the default value 
(`AttrTrackpointMultiplier=0.40`).



[1]: The following, where 0.4 is changed to 1.0: 
https://gitlab.freedesktop.org/libinput/libinput/-/blob/main/quirks/50-system-lenovo.quirks#L34

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