Always mark the parsed string with a terminated nul '\0' character. This removes
the need for the users to have to append the '\0' before using the parsed string.

Link: http://lkml.kernel.org/r/1516093350-12045-4-git-send-email-changbin.du@intel.comAcked-by: NNamhyung Kim <namhyung@kernel.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>