ci: Fix dist-job missing gobject/gio documentation

This requires meson >= 0.47.0 otherwise building the doc fails:
https://github.com/mesonbuild/meson/issues/3379

While at it, no need to to pass --prefix --libdir to meson, other CIs
don't have them.

meson.build

@@ -1,6 +1,6 @@
 project('glib', 'c', 'cpp',
   version : '2.57.1',
-  meson_version : '>= 0.46.1',
+  meson_version : '>= 0.47.0',
   default_options : [
     'buildtype=debugoptimized',
     'warning_level=1',