tools/runqslower: fix '-P'&'-p PID' conflict
tools/runqslower: fix '-P'&'-p PID' conflict

There is no conflict in '-P'&'-p PID', fix the commit(508d9694ba7e)
    tools/runqslower: add '-P' optional

Signed-off-by: zhenwei pi <03ae65e4243cd0b30ad9f2843504ff5c188b958d@bytedance.com>

iovisor/bcc,iovisor/bcc,iovisor/bcc,iovisor/bcc,iovisor/bcc