ANDROID: GKI: Export tracepoint tcp_retransmit_skb

Export tracepoint tcp_retransmit_skb to collect the retransmission rate
of specific tcp streams and adjust the network policy. Also, update the
symbol list accordingly.

2 function symbol(s) added
  'int __traceiter_tcp_retransmit_skb(void*, const struct sock*, const struct sk_buff*)'
  'void skb_orphan_partial(struct sk_buff*)'

1 variable symbol(s) added
  'struct tracepoint __tracepoint_tcp_retransmit_skb'

Bug: 344697033
Bug: 424394849
Change-Id: Ic2f9a9b31c2cbdf2a59bf3ba13805dfba5036cf5
Signed-off-by: Lei Zhang <lei.zhang.rj@vivo.com>
Signed-off-by: Wenhao Liao <wenhao.liao@vivo.corp-partner.google.com>
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Signed-off-by: Yanxiao Guo <yanxiao.guo@vivo.corp-partner.google.com>