Updated ttcp.c to build clean for RTEMS 6 and the machines it
originally built for. Also fixed ttcp.c to close network
sockets after completion. Defined a shell command for TTCP in
rtems-bsd-shell-ttcp.c. Added TTCP to the list of RTEMS network
commands in netcmds-config.h. Added declaration of the TTCP shell
command to rtems-bsd-commands.h. Modified libbsd.py to make waf
build TTCP and its shell command.
- Update the file builder generator to handle generator specific cflags and
includes. The tcpdump and libpcap have localised headers and need specific
headers paths to see them. There are also module specific flags and these
need to be passed to the lex and yacc generators.
- Add the tcpdump support.
