[EFL] Mark inspector/debugger/source-frame-count.html as flaky
https://bugs.webkit.org/show_bug.cgi?id=108768

Unreviewed EFL gardening.

Mark inspector/debugger/source-frame-count.html as flaky as it sometimes
crashes due to Bug 81574.

Patch by Christophe Dumez <dchris@gmail.com> on 2013-02-03

* platform/efl-wk2/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141715 268f45cc-cd09-0410-ab3c-d52691b4dbfc