NetworkPkg: Httpboot will fail the 2nd time result by wrong TCP state.

NetworkPkg: Httpboot will fail the 2nd time result by wrong TCP state.

If the 2nd boot quickly after the first succeed boot, it will function well.
But if you wait for some time after 1nd succeed boot and boot again, the
TCP state may change from established to closed wait as the http server send
fin flag, then boot fail occurred.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Zhang Lubo <lubo.zhang@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18783 6f19259b-4bc3-4df7-8a09-765794883524