[libgit2-glib] (3 commits) Non-fast-forward update to branch wip/adwait/commit_with_signature

[Alberto Fanjul <albfan src gnome org>]

The branch 'wip/adwait/commit_with_signature' 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:

  276ac8a... Added git_commit_create_with_signature
  32dcd13... oid is modified by function

Commits added to the branch:

  7f36e18... Allow to sign commits
  9330094... ggit_repository_create_commit_from_ids: add safe checks
  c814331... formatting