A few more minor tweaks.

	* etc/pkgusr/skel-package/build (update_commands): Just use
	update-pkg-project.

	* etc/pkgusr/handy_funcs (find_pkg_deps): Removed.  Wasn't all
	that handy.

	* etc/pkgusr/handy_funcs (build-update): Copy the new build script
	into ${HOME}/build-YYYYmmdd if SXEmacs isn't installed to allow
	for manual update.

	* usr/bin/forall_direntries_from (IGNORE_READDIR_RACE): For use
	primarily in the uninstall script.

	* usr/lib/pkgusr/uninstall_package (run): The -ignore_readdir_race
	option can't be used here directly.  It is now in
	forall_direntries_from and activated via env varibable set in this
	script.

Signed-off-by: Steve Youngs <steve@sxemacs.org>