Merge branch 'atk-fix' into '2020'

ATK (fix build dependency)

See merge request hps-public/easybuild-repository!549

Golden_Repo/a/ATK/ATK-2.36.0-GCCcore-9.3.0.eb

@@ -21,6 +21,7 @@ builddependencies = [
     ('binutils', '2.34'),
     ('GObject-Introspection', '1.64.1'),
     ('Meson', '0.55.0', '-Python-3.8.5'),
+    ('pkg-config', '0.29.2'),
     ('Ninja', '1.10.0')
 ]