Adding system call connections

[Shaun Jackman]

I'd like to add the following libc functions to newlib/libc/syscalls
that call the corresponding underscore prepended _xxx or _xxx_r
function.
	chdir, chmod, chown, dup, dup2, lstat, readlink, symlink, utime
	alarm, mkdir, mknod, rmdir, stime, truncate, umask

I'd also like to add libgloss/libnosys stubs for the following functions.
	chdir, chmod, chown, getdents, lstat, utime
	alarm, mkdir, mknod, rmdir, stime, truncate, umask

Comments? I'll probably send up a patch in the next week or so.

Cheers,
Shaun