Added verbose logging of SDL_Event

Added verbose logging of SDL_Event

This is mostly used for debugging purposes, and learning overlap between android/desktop
It is only active with the definition of the macro LOG_SDL_EVENTS_VERBOSELY.
    android/jni/Application.mk
    src/Android.mk
    src/SConscript
    src/core/MainManager.cpp
    src/util/Log.cpp
    src/util/Log.h
    src/util/LogUtil.cpp (+)
    src/util/LogUtil.h   (+)