skb: printing port numbers with gso trace events

Adding source and destination port number info
in the gso trace events to differentiate between
the flows.

CRs-Fixed: 2333588
Change-Id: Idbae7f95dfd56293805b58e3c6626f5f6e07d08a
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>