Add an extension point called gtk-im-module, which requires
the type GtkIMContext. Simplify the loading by using GIO
infrastructure. Drop the locale filtering for now, I don't
think it is really necessary nowadays.
Convert existing platform modules to gio modules.
Sill to do: Drop the conditional build machinery.
Either always include them, or never.
Before running gtk-query-immodules, the cache output directory may not
actually exist. Make sure it does before we try to write into it.
https://bugzilla.gnome.org/show_bug.cgi?id=793182
Signed-off-by: Daniel Stone <daniels@collabora.com>
When building GTK+ straight from the repository without any assistance
from packaging tools, we need to trigger system-wide updates, like the
icon theme cache update, or the schema compilation.
