[libsecret] (7 commits) Non-fast-forward update to branch wip/dueno/backend

[Daiki Ueno <dueno src gnome org>]

The branch 'wip/dueno/backend' 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:

  013aae4... secret-service: Move parent property setting to constructor
  7e42029... secret-backend: New interface to represent password storage
  642e0e7... secret-service: Implement SecretBackendInterface
  d75c82e... secret-backend: Add a way to uncache singleton instance
  2c2b9b1... secret-password: Port to SecretBackend interface
  634e5bd... secret-password: Add necessary gir annotations

Commits added to the branch:

  4d39dd1... secret-tool: Fix memleak (*)
  d9f9646... secret-service: Move parent property setting to constructor
  ad4c721... secret-backend: New interface to represent password storage
  9fcc4a7... secret-service: Implement SecretBackendInterface
  cd57043... secret-backend: Add a way to uncache singleton instance
  8688694... secret-password: Port to SecretBackend interface
  9a12974... secret-password: Add necessary gir annotations

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