[gnome-builder] (6 commits) Non-fast-forward update to branch wip/chergert/completion

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/completion' 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:

  19848cf... wip on new completion engine

Commits added to the branch:

  e7bc804... launcher: add helper to reset argv array (*)
  3b8fbea... buildsystem: delimit space in builddir (*)
  f9bd681... sysroot: fix leak of argv parameters (*)
  d7f89ca... sysroot: escape all command parameters (*)
  04b8df9... wip on new completion engine
  f65dac1... sourceview: remove word-completion from sourceview

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