tools: tcptop: Get command name from BPF code. (#3760)
tools: tcptop: Get command name from BPF code. (#3760)

Before this commit, command name was taken from PID using /proc/PID/comm.
But this method was not reliable as it does not work all the time.
So, this commit takes command name from BPF code using bpf_get_current_comm()
helper like it is done for biotop.

Signed-off-by: Francis Laniel <1493dd5457177a02e7616fdf81fd4bc3e79dbd48@linux.microsoft.com>
brendangregg/bcc,iovisor/bcc,iovisor/bcc,brendangregg/bcc,brendangregg/bcc,brendangregg/bcc,brendangregg/bcc,iovisor/bcc,iovisor/bcc,iovisor/bcc