[EFL][WKTR] platformRunUntil() should keep the main loop running
https://bugs.webkit.org/show_bug.cgi?id=107442

Reviewed by Noam Rosenthal.

EFL's implementation of platformRunUntil() should keep the main loop
running and avoid calling sleep() between calls to
ecore_main_loop_iterate(). This call to sleep seems to be a source
of deadlocks (see Bug 106884).

* WebKitTestRunner/efl/TestControllerEfl.cpp:
(WTR::TestController::platformRunUntil):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140327 268f45cc-cd09-0410-ab3c-d52691b4dbfc