Improve runtime test for kprobe wildcard
Improve runtime test for kprobe wildcard

The tests checks if there is a single BPF program loaded for a kprobe
with wildcard. The problem is that simply checking for occurrence of "1"
can lead to a false negative result. This adds a "progs: " prefix to fix
the issue.

iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace