[EFL] Add a few more web database functions to ewk_settings.

[EFL] Add a few more web database functions to ewk_settings.
https://bugs.webkit.org/show_bug.cgi?id=72148

Reviewed by Antonio Gomes.

Source/WebKit/efl:

Add code to change the default quota (there as only a getter so far)
and one to clear the databases.

* ewk/ewk_settings.cpp:
(ewk_settings_web_database_default_quota_set):
(ewk_settings_web_database_clear):
* ewk/ewk_settings.h:

Tools:

* DumpRenderTree/efl/LayoutTestControllerEfl.cpp:
(LayoutTestController::clearAllDatabases):
(LayoutTestController::setDatabaseQuota):

LayoutTests:

LayoutTestController::setDatabaseQuota is implemented now.

* platform/efl/Skipped:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@102966 268f45cc-cd09-0410-ab3c-d52691b4dbfc