[Code Cleanup] Move accounting.[ch] to decoder

Bit accounting is really a decoder thing

BUG=aomedia:450

Change-Id: Ib0229064caa98f742e2df08fd79c0451b0d8c09e
diff --git a/examples/inspect.c b/examples/inspect.c
index 8335272..92ac43b 100644
--- a/examples/inspect.c
+++ b/examples/inspect.c
@@ -35,7 +35,7 @@
 // #include "av1/av1_dx_iface.c"
 #include "../av1/common/onyxc_int.h"
 #if CONFIG_ACCOUNTING
-#include "../av1/common/accounting.h"
+#include "../av1/decoder/accounting.h"
 #endif
 #include "../av1/decoder/inspection.h"