remove a useless (and harmful on some platforms) -lnsl

from IKSEMEL_LIB.

Actually i am not even sure whether
-lgcrypt -lgpg-error are needed.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@51286 65c4cc65-6c06-0410-ace0-fbb531ad65f3