link libcrypt and libnsl only if they exist (they are glibc-specific)
link libcrypt and libnsl only if they exist (they are glibc-specific)

svn path=/trunk/KDE/kdepim/akonadi/server/; revision=685801

kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi