Update package to version 1.4.2.
Since upstream commit 71a8997cad60 ("Build xz tarballs instead of
bzip2"), .tar.xz is used instead of .tar.bz2, update `Source0`
accordingly.
- Resolves#806491#990213#1006029
- Remove stale ck-xinit-session references from xinitrc-common (#910969)
- Make startx pass "-nolisten tcp" by default, use -listen as server
option to disable this (#1111684)
- Teach Xclients script about lxde (#488602)