libgtk2: add init script to create /etc/gtk-2.0/gdk-pixbuf.loaders

It would be nicer to do this at compile time, but then we would need to
compile libgtk2 for the host as well.

package/libgtk2/S26libgtk2

@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+# run pgdk-pixbuf-query-loaders if needed
+
+FILE=/etc/gtk-2.0/gdk-pixbuf.loaders
+
+case "$1" in
+    start|"")
+	if [ ! -f "$FILE" ] ; then
+	    /usr/bin/gdk-pixbuf-query-loaders > "$FILE"
+	fi
+	;;
+    stop)
+	;;
+    *)
+	echo "Usage: $0 {start|stop}" >&2
+	exit 1
+	;;
+esac

package/libgtk2/libgtk2.mk

@@ -123,3 +123,7 @@ LIBGTK2_CONF_OPT += --disable-cups
 endif
 
 $(eval $(call AUTOTARGETS,package,libgtk2))
+
+$(LIBGTK2_HOOK_POST_INSTALL):
+	$(INSTALL) -m 755 package/libgtk2/S26libgtk2 $(TARGET_DIR)/etc/init.d/
+	touch $@