Travis-CI: Attempt to fix embed demo in Py 3.3/3.4

Demos/embed/Makefile

@@ -31,5 +31,5 @@ clean:
 	@rm -f *~ *.o *.so core core.* *.c embedded test.output
 
 test: clean all
-	./embedded > test.output
+	LD_LIBRARY_PATH=$(LIBDIR1):$$LD_LIBRARY_PATH ./embedded > test.output
 	$(PYTHON) assert_equal.py embedded.output test.output