Deprecate API which is deprecated in glib

* gio/src/application.hg: Deprecate set_action_group().
* gio/src/desktopappinfo.hg: Deprecate set_desktop_env().
* gio/src/settings.[hg|ccg]: Deprecate list_schemas(), range_check() and
property_schema().
* gio/src/simpleactiongroup.hg: Define GLIB_DISABLE_DEPRECATION_WARNINGS
in the .cc file.
* gio/src/tlsconnection.hg: Deprecate [set|get]_use_system_certdb()
and property_use_system_certdb().
* gio/src/volumemonitor.hg: Deprecate adopt_orphan_mount() also in
the .cc file.
* glib/glibmm/filelist.am: Build only the glibmm_files_used.
* glib/src/filelist.am: Add glibmm_files_deprecated_hg. Move thread.hg
and valuearray.hg to it.
* glib/src/keyfile.hg: Deprecate one of the load_from_dirs() methods
also in the .cc file.
* glib/src/valuearray.hg: Deprecate the whole class Glib::ValueArray.
* tests/glibmm_valuearray/main.cc: Undefine GLIBMM_DISABLE_DEPRECATED.