tools/bpf: remove test_sock_addr from TEST_GEN_PROGS

Since test_sock_addr is not supposed to run by itself,
remove it from TEST_GEN_PROGS and add it to
TEST_GEN_PROGS_EXTENDED. This way, run_tests will
not run test_sock_addr. The corresponding test to run
is test_sock_addr.sh.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>