torture: Rename RCU_QEMU_CMD to TORTURE_QEMU_CMD

# identify_qemu builddir

#

# Returns our best guess as to which qemu command is appropriate for

# the kernel at hand.  Override with the RCU_QEMU_CMD environment variable.

# the kernel at hand.  Override with the TORTURE_QEMU_CMD environment variable.

identify_qemu () {

	local u="`file "$1"`"

	if test -n "$RCU_QEMU_CMD"

	if test -n "$TORTURE_QEMU_CMD"

	then

		echo $RCU_QEMU_CMD

		echo $TORTURE_QEMU_CMD

	elif echo $u | grep -q x86-64

	then

		echo qemu-system-x86_64

		echo Cannot figure out what qemu command to use! 1>&2

		echo file $1 output: $u

		# Usually this will be one of /usr/bin/qemu-system-*

		# Use RCU_QEMU_CMD environment variable or appropriate

		# Use TORTURE_QEMU_CMD environment variable or appropriate

		# argument to top-level script.

		exit 1

	fi

		;;

	--qemu-cmd)

		checkarg --qemu-cmd "(qemu-system-...)" $# "$2" 'qemu-system-' '^--'

		RCU_QEMU_CMD="$2"; export RCU_QEMU_CMD

		TORTURE_QEMU_CMD="$2"

		shift

		;;

	--results)

	echo TORTURE_BUILDONLY="$TORTURE_BUILDONLY; export TORTURE_BUILDONLY"

	echo TORTURE_INITRD="$TORTURE_INITRD; export TORTURE_INITRD"

	echo TORTURE_KMAKE_ARG="$TORTURE_KMAKE_ARG; export TORTURE_KMAKE_ARG"

	echo RCU_QEMU_CMD="$RCU_QEMU_CMD; export RCU_QEMU_CMD"

	echo TORTURE_QEMU_CMD="$TORTURE_QEMU_CMD; export TORTURE_QEMU_CMD"

	echo TORTURE_QEMU_INTERACTIVE="$TORTURE_QEMU_INTERACTIVE; export TORTURE_QEMU_INTERACTIVE"

	echo TORTURE_QEMU_MAC="$TORTURE_QEMU_MAC; export TORTURE_QEMU_MAC"

	echo "mkdir -p "$resdir" || :"