eina_log: CONVENTION BREAK!!!! automatically adds \n

eina_log: CONVENTION BREAK!!!! automatically adds \n

Automatically add \n to messages. Since we use that prefix, there is
no use to allow messages without \n, it would look a mess.

Some logging systems may not require the trailing newline, for example
logging to xml or syslog, for those you don't need to ignore this char
if present.

Yes, this breaks convention, but better now than latter. And the
results are not so bad.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/eina@42200 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33