bpf tools: Fix syscall argument

Coverity flagged this under CID 1354884 as a sizeof mismatch, it turns
out that the argument "attr" passed to syscall should have been a
pointer to attr in the first place.

Reported-by: coverity (CID 1354884)
Signed-off-by: Florian Fainelli <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Acked-by: Wang Nan <[email protected]>
Cc: Jiri Olsa <[email protected]>
Fixes: 8f9e05f ("perf tools: Fix PowerPC native building")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: ffainelli

tools/build/feature/test-bpf.c

@@ -31,5 +31,5 @@ int main(void)
 	 * Test existence of __NR_bpf and BPF_PROG_LOAD.
 	 * This call should fail if we run the testcase.
 	 */
-	return syscall(__NR_bpf, BPF_PROG_LOAD, attr, sizeof(attr));
+	return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
 }