e-base: add module.so to PRIVATE_LIBS

* efl and e17 modules are installed in different directories and nothing is going to
  link with them -> no need to register them in shlibs providers

* see https://bugzilla.yoctoproject.org/show_bug.cgi?id=4628

 for more
  details about why this WARNING about multiple shlib providers was added

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>