Fixed command-line options for gambit in benchmarks.

collects/tests/racket/benchmarks/common/auto.rkt

@@ -457,8 +457,7 @@ exec racket -qu "$0" ${1+"$@"}
                 run-gambit-exe
                 extract-gambit-times
                 clean-up-o1
-                (append '(nucleic2)
-                        racket-specific-progs))
+                racket-specific-progs)
      (make-impl 'larceny
                 setup-larceny
                 mk-larceny

collects/tests/racket/benchmarks/common/mk-gambit.rktl

@@ -6,5 +6,8 @@
 (when (file-exists? (format "~a.o1" name))
   (delete-file (format "~a.o1" name)))
 
-(system (format "gsc -:m10000 -dynamic -prelude '(include \"gambit-prelude.sch\")' ~a.sch"
+(system (format "gsc -:m10000~a -dynamic -prelude '(include \"gambit-prelude.sch\")' ~a.sch"
+                (if (memq (string->symbol name) '(nucleic2))
+                    ",s"
+                    "")
                 name))