[libglnx] (5 commits) Non-fast-forward update to branch wip/smcv/subproject

[Simon McVittie <smcv src gnome org>]

The branch 'wip/smcv/subproject' 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:

  5e2f847... meson: Always build with hidden symbol visibility
  4a85c99... tests: Build libglnx-testlib as a separate static library
  a7f6643... tests: Optionally skip building and running the actual test
  47bab7e... tests: Verify libglnx can work as a subproject

Commits added to the branch:

  b76cf45... meson: Automatically link libglnx-dependent objects to gio-
  eeea247... meson: Always build with hidden symbol visibility
  c500c36... tests: Build libglnx-testlib as a separate static library
  96ba9f4... tests: Optionally skip building and running the actual test
  5e0450a... tests: Verify libglnx can work as a subproject