* Rename config.def.h to config.mobintl.h.
* config.mobintl.h:
* Rename the macro config_def_h_INCLUDED to config_h_INCLUDED.
* Remove a tailing space as a refactoring.
* Makefile: Add config.h to the clean task.
Signed-off-by: Jun Aruga <jun.aruga@gmail.com>