(install-dir): If cross-compiler, create $(tooldir) and $(assertdir).

From-SVN: r2889

gcc/Makefile.in

@@ -1442,6 +1442,12 @@ install-dir:
 	-if [ -d $(libdir)/gcc-lib/$(target)/$(version)/include ] ; then true ; else mkdir $(libdir)/gcc-lib/$(target)/$(version)/include ; fi
 	-if [ -d $(bindir) ] ; then true ; else mkdir $(bindir) ; fi
 	-if [ -d $(includedir) ] ; then true ; else mkdir $(includedir) ; fi
+	-if [ -d $(includedir) ] ; then true ; else mkdir $(includedir) ; fi
+	-if [ -f gcc-cross ] ; \
+	  if [ -d $(tooldir) ] ; then true ; else mkdir $(tooldir) ; fi \
+	  if [ -d $(assertdir) ] ; then true ; else mkdir $(assertdir) ; fi \
+	else true; \
+	fi
 # We don't use mkdir -p to create the parents of mandir,
 # because some systems don't support it.
 # Instead, we use this technique to create the immediate parent of mandir.