torture: Make torture.sh rcuscale and refscale deal with allmodconfig

The .mod.c files created by allmodconfig builds interfers with the approach
torture.sh uses to enumerate types of rcuscale and refscale runs.  This
commit therefore tightens the pattern matching to avoid this interference.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/testing/selftests/rcutorture/bin/torture.sh

@@ -302,7 +302,7 @@ fi
 
 if test "$do_refscale" = yes
 then
-	primlist="`grep '\.name[ 	]*=' kernel/rcu/refscale*.c | sed -e 's/^[^"]*"//' -e 's/".*$//'`"
+	primlist="`grep '\.name[ 	]*=' kernel/rcu/refscale.c | sed -e 's/^[^"]*"//' -e 's/".*$//'`"
 else
 	primlist=
 fi
@@ -314,7 +314,7 @@ done
 
 if test "$do_rcuscale" = yes
 then
-	primlist="`grep '\.name[ 	]*=' kernel/rcu/rcuscale*.c | sed -e 's/^[^"]*"//' -e 's/".*$//'`"
+	primlist="`grep '\.name[ 	]*=' kernel/rcu/rcuscale.c | sed -e 's/^[^"]*"//' -e 's/".*$//'`"
 else
 	primlist=
 fi