Assigning "attr" to "attr" does not have any effect, but was caught by
Coverity, so let's remove this.

Reported-by: coverity (CID 1354720)
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Tested-by: NWang Nan <wangnan0@huawei.com>
Acked-by: NAlexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Fixes: 1b76c13e ("bpf tools: Introduce 'bpf' library and add bpf feature check")
Link: http://lkml.kernel.org/r/1461551694-5512-2-git-send-email-f.fainelli@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>