Avoid installing examples to system root.

Patch from Fedora.

Gentoo-bug: 488150

--- a/Makefile.in
+++ b/Makefile.in
@@ -953,8 +953,7 @@
 ALLGECODEHDR = \
 	$(SUPPORTHDR) $(KERNELHDR) $(SEARCHHDR) \
         $(INTHDR) $(FLOATHDR) $(SETHDR) $(MMHDR) \
-	$(DRIVERHDR) $(ITERHDR) $(GISTHDR) $(FLATZINCHDR) \
-	$(INTEXAMPLEHDR)
+	$(DRIVERHDR) $(ITERHDR) $(GISTHDR) $(FLATZINCHDR)
 ALLHDR = \
 	$(ALLGECODEHDR) $(THIRDHDR)
 ALLOBJ0 = $(ALLSRC:%.cpp=%$(OBJSUFFIX)) \
