torture: Consolidate qemu-cmd duration editing into kvm-transform.sh

Currently, kvm-again.sh updates the duration in the "seconds=" comment
in the qemu-cmd file, but kvm-transform.sh updates the duration in the
actual qemu command arguments.  This is an accident waiting to happen.

This commit therefore consolidates these updates into kvm-transform.sh.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/testing/selftests/rcutorture/bin/kvm-again.sh

@@ -155,10 +155,6 @@ do
 	kernel_dir="`echo $qemu_cmd_dir | sed -e 's/\.[0-9]\+$//'`"
 	jitter_dir="`dirname "$kernel_dir"`"
 	kvm-transform.sh "$kernel_dir/bzImage" "$qemu_cmd_dir/console.log" "$jitter_dir" $dur < $T/qemu-cmd > $i
-	if test -n "$dur"
-	then
-		echo "# seconds=$dur" >> $i
-	fi
 	if test -n "$arg_remote"
 	then
 		echo "# TORTURE_KCONFIG_GDB_ARG=''" >> $i

tools/testing/selftests/rcutorture/bin/kvm-transform.sh

@@ -44,6 +44,14 @@ fi
 
 awk -v image="$image" -v consolelog="$consolelog" -v jitter_dir="$jitter_dir" \
     -v seconds="$seconds" '
+/^# seconds=/ {
+	if (seconds == "")
+		print $0;
+	else
+		print "# seconds=" seconds;
+	next;
+}
+
 /^# TORTURE_JITTER_START=/ {
 	print "# TORTURE_JITTER_START=\". jitterstart.sh " $4 " " jitter_dir " " $6 " " $7;
 	next;