Move bionic_macros.h from private to platform.

Test: treehugger
Change-Id: Ie473914f4c8924c7240b3ac22093a9daf42fc948
diff --git a/libc/malloc_debug/DebugData.h b/libc/malloc_debug/DebugData.h
index 3a36299..13bba48 100644
--- a/libc/malloc_debug/DebugData.h
+++ b/libc/malloc_debug/DebugData.h
@@ -33,7 +33,7 @@
 #include <memory>
 #include <vector>
 
-#include <private/bionic_macros.h>
+#include <platform/bionic/macros.h>
 
 #include "Config.h"
 #include "GuardData.h"