contrib: dvdnav: disable examples using configure option

contrib/src/dvdnav/dvdnav.patch

-diff -ruN libdvdnav/Makefile.am libdvdnav.new/Makefile.am
---- libdvdnav/Makefile.am	2008-06-18 17:06:33.000000000 +0200
-+++ libdvdnav.new/Makefile.am	2011-10-11 01:02:18.768524699 +0200
-@@ -1,7 +1,7 @@
- include $(top_srcdir)/misc/Makefile.common
- 
- 
--SUBDIRS = src examples doc misc m4
-+SUBDIRS = src misc m4
- 
- EXTRA_DIST = autogen.sh \
- 	     AUTHORS \

contrib/src/dvdnav/rules.mak

@@ -24,13 +24,12 @@ $(TARBALLS)/libdvdnav-git.tar.xz:
 
 dvdnav: libdvdnav-$(LIBDVDNAV_VERSION).tar.xz .sum-dvdnav
 	$(UNPACK)
-	$(APPLY) $(SRC)/dvdnav/dvdnav.patch
 	$(MOVE)
 
 DEPS_dvdnav = dvdcss dvdread
 
 .dvdnav: dvdnav .dvdcss .dvdread
 	cd $< && sh autogen.sh noconfig
-	cd $< && $(HOSTVARS) ./configure $(HOSTCONF)
+	cd $< && $(HOSTVARS) ./configure $(HOSTCONF) --disable-examples
 	cd $< && $(MAKE) install
 	touch $@