Move bionic_macros.h from private to platform.

Test: treehugger
Change-Id: Ie473914f4c8924c7240b3ac22093a9daf42fc948
diff --git a/libc/malloc_debug/debug_disable.h b/libc/malloc_debug/debug_disable.h
index f9c3149..984bc25 100644
--- a/libc/malloc_debug/debug_disable.h
+++ b/libc/malloc_debug/debug_disable.h
@@ -30,7 +30,7 @@
 
 #include <sys/cdefs.h>
 
-#include <private/bionic_macros.h>
+#include <platform/bionic/macros.h>
 
 // =============================================================================
 // Used to disable the debug allocation calls.