staging: lustre: osc: fix debug log message formatting

Corrected newline specifier in debug log message.

Signed-off-by: Ashish Purkar <ashish.purkar@seagate.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7029
Reviewed-on: http://review.whamcloud.com/16046


Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>