Fixed:
* In build1:
$ runqemu nfs qemux86-64
In build2:
$ runqemu nfs qemux86-64
It would fail before since the port numerbs and conf files are
conflicted, now make runqemu-export-rootfs work together with runqemu to
fix the problem.
* And we don't need export PSEUDO_LOCALSTATEDIR in runqemu, the
runqemu-export-rootfs can handle it well based on NFS_EXPORT_DIR.
* Remove "async" option from unfsd to fix warning in syslog:
Warning: unknown exports option `async' ignored
* Fixed typos
Both slirp and tap can work.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
