build: fix printf warnings for icc (-Wformat-security)

build: fix printf warnings for icc (-Wformat-security)

Intel compiler complains about printf style function calls with trivial
format string and no other arguments. Like this one:

../sys-utils/ipcrm.c(117): warning #2279: printf/scanf format not a string literal and no format arguments
                        err(EXIT_FAILURE, iskey ? _("key failed") : _("id failed"));