[gnome-shell] Created tag 3.21.1

[Florian Müllner <fmuellner src gnome org>]

The unsigned tag '3.21.1' was created.

Tagger: Florian Müllner <fmuellner gnome org>
Date: Fri Apr 29 17:00:24 2016 +0200

    Tag release 3.21.1

Changes since the last tag '3.20.1':

Arash Mousavi (1):
      [l10n][fa] Fix weekday translation string

Florian Müllner (10):
      recorder: Fall back to ~ if XDG_VIDEOS_DIR doesn't exist
      st: Do not try to unref NULL CoglObjects
      Do not skip CoglError parameters
      st: Don't assert when corner texture creation fails
      workspaceThumbnail: Fix size request signatures
      system: Only show rotation lock when a builtin output is present
      Update gvc submodule
      build: Explicitly add mutter-cogl-pango dependency
      build: Point executables to our private lib path
      Bump version to 3.21.1

GNOME Translation Robot (1):
      Updated Scottish Gaelic translation

Heiher (1):
      modalDialog: Fix invalid argument 'timestamp' for pushModal

Kristjan SCHMIDT (1):
      Updated Esperanto translation

Marek Chalupa (1):
      dnd: Cancel the animation on drag actor destruction

Rui Matos (1):
      Build with merged mutter/clutter/cogl