Fix the CI failures on new images

Peter Hutterer requested to merge whot/libevdev:wip/switch-ci-to-fedora into master
  • switch to Fedora for most of the job since it's a better canary than centos 7
  • ignore the mangle_path that now shows up in the leaking symbols test
  • some centos changes, also to stop the make dist errors on centos 7 now that we don't install doxygen anymore on that

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