[EFL] Build break when using cmake without CMAKE_BUILD_TYPE
https://bugs.webkit.org/show_bug.cgi?id=114835

Unreviewed build fix.

Patch by Ryuan Choi <ryuan.choi@gmail.com> on 2013-04-18

* Source/cmake/OptionsEfl.cmake:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148718 268f45cc-cd09-0410-ab3c-d52691b4dbfc