Update Gpio Makefile

diff --git a/plug b/plug
index 2262e71bbadf7cbe08e58e76870ede5d0e0abd72..e484995a51471a0b2b6040328f2d380268ee5fe0 160000 (submodule)
--- a/plug
+++ b/plug
@@ -1 +1 @@
-Subproject commit 2262e71bbadf7cbe08e58e76870ede5d0e0abd72
+Subproject commit e484995a51471a0b2b6040328f2d380268ee5fe0