The intercept is called update_icon_cache which is vague: rename to
update_gtk_icon_cache to make it clearer what it is for, and add a comment
explaining what class caused it to be used.
(From OE-Core rev: 3158adbe684890adc56af11e19af872e90e09d41)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
