[2.11..2.13] abstractions/X: add another xauth path
Future sddm version will use $XDG_RUNTIME_DIR/xauth_XXXXXX
References:
- https://bugzilla.opensuse.org/show_bug.cgi?id=1174290
- https://bugzilla.suse.com/show_bug.cgi?id=1174293
- https://github.com/sddm/sddm/pull/1230
- https://github.com/jonls/redshift/issues/763
This is the 2.13 version of 35f033ca / !581 (merged)
The difference is that this commit avoids using the @{run} variable.
I propose this patch for 2.11..2.13.
