ecore_con: fix dns lookup crash issue.

ecore_con: fix dns lookup crash issue.

Summary:
When executed ecore_con_lookup_example function, we were getting a crash. This is the fix for the crash. I analysed it in the valgrind and found the error. Valgrind reported invalid free at this place.
svr->name is getting freed in _ecore_con_server_eo_base_destructor function and svr is getting freed in ecore_con_shutdown function.
Signed-off-by: Srivardhan Hebbar <sri.hebbar@samsung.com>
Reviewers: cedric

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D2398

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>