Add capability for the lux

Add capability for the lux

Currently, the launchpad-process-pool has a problem about creating
children processes. Because, there are many threads in the launchpad-process-pool.
If the sub thread tries to allocate the memory or calling getenv() when
the main thread is calling fork(), it makes the deadlock issue of
the children processes. The lux is a children process of
the launchpad-process-pool to create children processes for applications.
(The lux is a single thread process.)

Change-Id: I20d7ce82b77af226bda0e59b8690896245b64580
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>