[EFL] Change ewk_settings_icon_database_icon_object_add to proper API name.

[EFL] Change ewk_settings_icon_database_icon_object_add to proper API name.
https://bugs.webkit.org/show_bug.cgi?id=82438

Patch by Grzegorz Czajkowski <g.czajkowski@samsung.com> on 2012-04-04
Reviewed by Andreas Kling.

The purpose of ewk_settings_icon_database_icon_object_add is to get icon
for the given URL. This function doesn't add anything to database.
Documentation and API name are adjusted.

* ewk/ewk_settings.cpp:
(ewk_settings_icon_database_icon_object_get):
* ewk/ewk_settings.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@113173 268f45cc-cd09-0410-ab3c-d52691b4dbfc