[gtk] (12 commits) ...Merge branch 'matthiasc/perf-tests' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  820c940... cssnode: Make the profiler support unconditional (*)
  05b98c3... gdk: Make profiler support unconditional (*)
  a6f300c... widget-factory: Add a way to quit automatically (*)
  ea17728... Prototype a sysprof helper (*)
  417edd2... Run the css performance test in the testsuite (*)
  23426b0... Fix testsuite without -Dprofiler=true (*)
  d32b0d3... ci: Add sysprof-devel to the image (*)
  704a659... ci: Build with profiler support (*)
  c8485af... Use the v9 image for ci runs (*)
  81ddf4b... testsuite: Point performance tests at uninstalled schemas (*)
  e9e4bd4... testsuite: Make performance test fail (*)
  d24d0e9... Merge branch 'matthiasc/perf-tests' into 'master'

(*) This commit already existed in another branch; no separate mail sent