gdbus: Fix deprecated API

Use G_DEFINE_TYPE_WITH_PRIVATE() instead of g_type_class_add_private().
19 jobs for fix-build in 26 minutes and 10 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Source Check
passed #49694
cppcheck

00:12:36

passed #49695
cpplint

00:02:11

passed #49696
eslint

00:12:41

passed #49693
fedora

00:14:08

 
  Test
passed #49697
fedora_clang

00:06:11

 
  Thorough Tests
manual #49709
allowed to fail manual
armv8
passed #49700
coverage

00:05:48

manual #49704
allowed to fail manual
installed_tests
manual #49705
allowed to fail manual
lts
manual #49702
allowed to fail manual
no_graphics
manual #49703
allowed to fail manual
no_profiler
manual #49710
allowed to fail manual
ppc64le
passed #49698
sanitizer_gcc

00:05:50

manual #49701
allowed to fail manual
valgrind
passed #49699
with_logging

00:05:02

manual #49708
allowed to fail manual
zeal_11
manual #49706
allowed to fail manual
zeal_2
manual #49707
allowed to fail manual
zeal_4
 
  Delivery
manual #49711
allowed to fail manual
packaging