apparmor.c: drop newline when reading current profile

Otherwise we fail to recognize if we are already unconfined.  Then,
if we want to *start* unconfined, and /proc is readonly, start fails
even though it should be able to proceed.

With this patch, that situation works.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Reported-by: Andre nathan <andre@digirati.com.br>