fix compiler warning

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@gmail.com>
cleanup probe event resources if error happens

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@gmail.com>
fix cannot use filter for uprobe event

There have some specific parse rule for uprobe event,
because uprobe eventdef contains '/' for userspace execute
binary, so ktap should realize this.

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@gmail.com>