Use s.c_str() in log messages

Partly resolves openbmc/openbmc 2905

Also, fixed related problem with parenthesis in occ_presence.cpp.

Tested: static_assert only

Change-Id: Ib0dbf9c895e9f636ddc873221fd1ef93980c0353
Signed-off-by: Joseph Reynolds <jrey@us.ibm.com>
2 files changed