Port folder renaming changes from AOM

Manually cherry-picked commits:
ceef058 libvpx->libaom part2
3d26d91 libvpx -> libaom
cfea7dd vp10/ -> av1/
3a8eff7 Fix a build issue for a test
bf4202e Rename vpx to aom

Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc
diff --git a/ivfdec.c b/ivfdec.c
index f64e594..24a0d94 100644
--- a/ivfdec.c
+++ b/ivfdec.c
@@ -12,7 +12,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "vpx_ports/mem_ops.h"
+#include "aom_ports/mem_ops.h"
 
 #include "./ivfdec.h"