x11-apps/xinit: Rev bump for commit 2bb6b9e50bdb

x11-apps/xinit: Rev bump for commit 2bb6b9e50bdb

Commit 2bb6b9e50bdb8efc9a4627e60a4e63d38e8d6255 ("x11-apps/xinit: use
/lib/gentoo/functions.sh instead of deprecated
/etc/init.d/functions.sh") modified a file installed by all versions of
the package (which were all stable) without a rev bump. It also
neglected to add a dependency on sys-apps/gentoo-functions.

This commit revs the version (straight to stable) so users get the new
startDM.sh script, and the next commit will remove all other xinit
versions.

Gentoo-Bug: https://bugs.gentoo.org/504140