in XFree86>=4.3; ignore it when checking dependencies or buildlinking.
Skip also randrext (Xrandr's header files) in this case.
The patch agains x11-links' builtin.mk is a slightly modified version of
the patch jlam@ posted in:
http://mail-index.netbsd.org/tech-pkg/2004/03/15/0001.html
ok'd by jlam@
built-in or not into a separate builtin.mk file. The code to deal
checking for built-in software is much simpler to deal with in pkgsrc.
The buildlink3.mk file for a package will be of the usual format
regardless of the package, which makes it simpler for packagers to
update a package.
The builtin.mk file for a package must define a single yes/no variable
USE_BUILTIN.<pkg> that is used by bsd.buildlink3.mk to decide whether
to use the built-in software or to use the pkgsrc software.
