Makefile: `make cleandoc' now removes orgguide.pdf as well.

Makefile

@@ -425,7 +425,7 @@ cleancontrib:
 cleanelc:
 	rm -f $(ELCFILES)
 cleandoc:
-	(cd doc; rm -f org.pdf org org.html orgcard.pdf)
+	(cd doc; rm -f org.pdf org org.html orgcard.pdf orgguide.pdf)
 	(cd doc; rm -f *.aux *.cp *.cps *.dvi *.fn *.fns *.ky *.kys *.pg *.pgs)
 	(cd doc; rm -f *.toc *.tp *.tps *.vr *.vrs *.log *.html *.ps)
 	(cd doc; rm -f orgcard_letter.tex orgcard_letter.pdf)