Add support for the following system calls:
ioctl (FIONREAD)
fcntl (F_GETFL)
fcntl (F_SETFL)
setsockopt (SOL_IPV6, IPV6_V6ONLY)
setsockopt (SOL_TCP, TCP_NODELAY)
setsockopt (SOL_SOCKET, SO_REUSEADDR)
setsockopt (SOL_SOCKET, SO_BROADCAST)
This patch supersedes https://gerrit.fd.io/r/#/c/8765/
Change-Id: I5d5309d9f43d93a990b389d8cb667631de1903fe
Signed-off-by: Steven <sluong@cisco.com>