[yelp] Created tag 3.21.3

[Shaun McCance <shaunm src gnome org>]

The signed tag '3.21.3' was created.

Tagger: Shaun McCance <shaunm gnome org>
Date: 1603929094 -0400

    Version 3.21.3

Changes since the last tag '3.20.1':

Cosimo Cecchi (1):
      tests: fix a GCC warning

Cédric Valmary (2):
      Updated Occitan translation
      Updated Occitan translation

David King (1):
      Version 3.21.3

Emmanuele Bassi (1):
      build: Ensure that autogen.sh works when builddir != srcdir

GNOME Translation Robot (2):
      Updated Portuguese translation
      Updated Scottish Gaelic translation

Michael Catanzaro (1):
      Update .gitignore for nonrecursive build

Sam Spilsbury (1):
      Makefile: Move to AM_DISTCHECK_CONFIGURE_FLAGS

Shaun McCance (1):
      Update very old README file