[PATCH 4/9] rcutorture/kvm.sh: Use consistent usage for --qemu-args

'--qemu-args' option usage is wrongly copied from '--qemu-cmd' option and it's argument type description message format is inconsistent with other arguments. This commit fixes the usage and type messages to be consistent with others. Fixes: e9ce640001c6 ("rcutorture: Add --qemu-args argument to

[PATCH 4/9] rcutorture/kvm.sh: Use consistent usage for --qemu-args

'--qemu-args' option usage is wrongly copied from '--qemu-cmd' option and it's argument type description message format is inconsistent with other arguments. This commit fixes the usage and type messages to be consistent with others. Fixes: e9ce640001c6 ("rcutorture: Add --qemu-args argument to