[gobject-introspection] (5 commits) Non-fast-forward update to branch tintou/repository-test-fix

[Christoph Reiter <creiter src gnome org>]

The branch 'tintou/repository-test-fix' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  cd42fda... tests: Actually test libregress by specifying the LD_LIBRAR

Commits added to the branch:

  1cb3b2b... meson: change "cairo" from a boolean to a feature option (*)
  efbd35d... meson: change "doctool" from a boolean to a feature option (*)
  b57090d... girepository: Fix memory leak (*)
  7f7c41c... tests: Actually test libregress by specifying the LD_LIBRAR
  e484235... gitypelibtest: make tests fail if the library can't be foun

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