Staging: lustre: Fix quoted string split across lines in conrpc.c

This patch fixes the following checkpatch.pl warning in conrpc.c-
WARNING: quoted string split across lines conrpc.c

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>