perf test: Fix bpf test sample mismatch reporting

When the expected sample count in the condition changed, the message
needs to be changed too, otherwise we'll get:

0x1001f2091d8: mmap mask[0]:
BPF filter result incorrect, expected 56, got 56 samples

Fixes: 4b04e0decd2518e5 ("perf test: Fix basic bpf filtering test")
Signed-off-by: Michael Petlan <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Sumanth Korikkar <[e-mail]>
Link: https //lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/tests/bpf.c

···
 	}
 
 	if (count != expect * evlist->core.nr_entries) {
-		pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect, count);
+		pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect * evlist->core.nr_entries, count);
 		goto out_delete_evlist;
 	}