[EFL][WK2] Add fallback for EWK2UnitTestBase if opengl is not available.
https://bugs.webkit.org/show_bug.cgi?id=117504

Patch by Changhyup Jwa <ch.jwa@samsung.com> on 2013-06-11
Reviewed by Christophe Dumez.

There're many fails on efl webkit2 unit test if opengl is not available.
So, add fallback to non-opengl evas engine.

* UIProcess/API/efl/tests/UnitTestUtils/EWK2UnitTestBase.cpp:
(EWK2UnitTest::EWK2UnitTestBase::SetUp):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@151433 268f45cc-cd09-0410-ab3c-d52691b4dbfc