[gnome-software] (6 commits) Non-fast-forward update to branch wip/kalev/appstream-silo-threadsafety

[Kalev Lember <klember src gnome org>]

The branch 'wip/kalev/appstream-silo-threadsafety' 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:

  2df599b... appstream: Make XbSilo access threadsafe

Commits added to the branch:

  9d33f3f... shell-extensions: Fix a memory leak when parsing the list o (*)
  9a9c7b6... trivial: Chain up finalize (*)
  cf883e3... Backport GRWLock autoptr support
  a18fd72... appstream: Add locking for XbSilo
  20c4747... flatpak: Add locking for XbSilo
  a0476aa... shell-extensions: Add locking for XbSilo

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