[CMake][EFL] Build test tools only for developer mode

[CMake][EFL] Build test tools only for developer mode
https://bugs.webkit.org/show_bug.cgi?id=142761

Reviewed by Csaba Osztrogonác.

Do not build EFL MiniBrowser, WebKitTestRunner, and ImageDiff on production mode.

.:

* Source/cmake/OptionsEfl.cmake:
* Source/cmake/OptionsGTK.cmake: Move ENABLE_MINIBROWSER to common place.
* Source/cmake/WebKitFeatures.cmake: Define ENABLE_MINIBROWSER variable.
* Source/cmakeconfig.h.cmake:

Tools:

* CMakeLists.txt:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@181621 268f45cc-cd09-0410-ab3c-d52691b4dbfc