bpflist: list only real bpf objects
bpflist: list only real bpf objects

The regular expression '.*bpf-(\\w+)' used to grep for bpf objects would also
list regular files. For example, a process like `vim /tmp/bpf-woo` would be
listed in the output and the type of the BPF object will be 'woo'. Fix this
by correcting the regular expression.

Signed-off-by: Anton Protopopov <73889760778ff960467ba75991d0ae67a00c37ec@gmail.com>

brendangregg/bcc,tuxology/bcc,iovisor/bcc,brendangregg/bcc,brendangregg/bcc,tuxology/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,iovisor/bcc,iovisor/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,tuxology/bcc