Log Message:
dbus: update to 1.12.8.

dbus 1.12.8 (2018-04-30)
========================

The “golden super-velociraptor” release.

Enhancements:

• The Devhelp documentation index is now in version 2 format
  (fd.o #106186, Simon McVittie)

• Give the dbus-daemon man page some scarier warnings about
  <allow_anonymous/> and non-local TCP, which are insecure and should
  not be used, particularly for the standard system and session buses
  (fd.o #106004, Simon McVittie)

Fixes:

• Fix installation of Ducktype documentation with newer yelp-build
  versions (fd.o #106171, Simon McVittie)