Testconfig: Macx-clang_developer-build_OSX_10.8 for all submodules

Added macx-clang_developer-build_OSX_10.8 stage to ran with all project
configurations.

Change-Id: I3b4b73ca75b39f7824cc96a48a0763eaa47b3a19
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>